Raid5 to Raid6 reshape stalled

3 messages, 2 authors, 2021-03-06 · open the first message on its own page

Raid5 to Raid6 reshape stalled

From: <hidden>
Date: 2021-03-06 11:38:09

Hello,

Reshape is currently stalled at 58%. If I reboot the system, the array
is started in auto-read-only mode with resync pending. I can freeze
the sync and mount the filesystem read only to access the data.

When it first stalled and rebooted, I ran extended smart tests on all
18 drives and one came back with read error. I ddrescued it to a new
one (99.99% rescued) and swapped it out, but the reshape still stalls
immediately when setting the array to --readwrite.

The raid5 array started out with 12 drives. I added 6 more drives then
grew it to 18 drives and raid level 6 at the same time. This migration
was started with mdadm 4.1 running on kernel 4.19. I've tried booting
with debian testing running kernel 5.10 (didn't check mdadm version),
and also archlinux running 5.11 but with the same results.

/dev/md0:
           Version : 1.2
     Creation Time : Tue Dec 17 01:51:38 2019
        Raid Level : raid6
        Array Size : 42975736320 (40984.86 GiB 44007.15 GB)
     Used Dev Size : 3906885120 (3725.90 GiB 4000.65 GB)
      Raid Devices : 18
     Total Devices : 18
       Persistence : Superblock is persistent

     Intent Bitmap : Internal

       Update Time : Sat Mar  6 09:41:58 2021
             State : clean, degraded, resyncing (PENDING)
    Active Devices : 17
   Working Devices : 18
    Failed Devices : 0
     Spare Devices : 1

            Layout : left-symmetric-6
        Chunk Size : 512K

Consistency Policy : bitmap

     Delta Devices : 5, (13->18)
        New Layout : left-symmetric

              Name : debian:0  (local to host debian)
              UUID : 2a0d5568:ea53b429:30df79c9:e7559668
            Events : 303246

    Number   Major   Minor   RaidDevice State
       0       8      129        0      active sync   /dev/sdi1
       1       8       49        1      active sync   /dev/sdd1
       2       8      209        2      active sync   /dev/sdn1
       3       8        1        3      active sync   /dev/sda1
       4       8       65        4      active sync   /dev/sde1
       5       8      145        5      active sync   /dev/sdj1
       6      65       17        6      active sync   /dev/sdr1
       7       8      113        7      active sync   /dev/sdh1
       8      65        1        8      active sync   /dev/sdq1
       9       8       81        9      active sync   /dev/sdf1
      10       8       17       10      active sync   /dev/sdb1
      12       8      193       11      active sync   /dev/sdm1
      18       8      241       12      spare rebuilding   /dev/sdp1
      17       8      225       13      active sync   /dev/sdo1
      16       8      177       14      active sync   /dev/sdl1
      15       8      161       15      active sync   /dev/sdk1
      14       8       97       16      active sync   /dev/sdg1
      13       8       33       17      active sync   /dev/sdc1

One of the entries from dmesg the first time reshaping stalled:

[105003.994653] INFO: task md0_reshape:3296 blocked for more than 120 seconds.
[105003.994916]       Tainted: G          I       4.19.0-6-amd64 #1
Debian 4.19.67-2+deb10u1
[105003.995169] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[105003.995434] md0_reshape     D    0  3296      2 0x80000000
[105003.995436] Call Trace:
[105003.995441]  ? __schedule+0x2a2/0x870
[105003.995442]  schedule+0x28/0x80
[105003.995448]  reshape_request+0x862/0x940 [raid456]
[105003.995451]  ? finish_wait+0x80/0x80
[105003.995454]  raid5_sync_request+0x34a/0x3b0 [raid456]
[105003.995460]  md_do_sync.cold.86+0x3f4/0x911 [md_mod]
[105003.995461]  ? finish_wait+0x80/0x80
[105003.995464]  ? __switch_to_asm+0x35/0x70
[105003.995467]  ? md_rdev_init+0xb0/0xb0 [md_mod]
[105003.995471]  md_thread+0x94/0x150 [md_mod]
[105003.995473]  kthread+0x112/0x130
[105003.995475]  ? kthread_bind+0x30/0x30
[105003.995476]  ret_from_fork+0x35/0x40

I'm not sure where to continue troubleshooting. Been moving drives
around in the storage appliance in case there are bad ports on the
backplane but doesn't seem to make any difference. I only have one
4-port HBA right now so can't even try another. The storage appliance
has 2 controllers and already tried swapping them as well as the SAS
cables. Only thing left I can try hardware wise is to install the
interposers that go in between the drives and the backplane but not
very hopeful.

Any help would be greatly appreciated. I don't have the extra space
right now to copy everything out and create a new array so really
hoping to get past this stalling issue. Thanks.

Re: Raid5 to Raid6 reshape stalled

From: antlists <hidden>
Date: 2021-03-06 13:21:50

https://raid.wiki.kernel.org/index.php/Linux_Raid#When_Things_Go_Wrogn

You've obviously covered some of this - glitches with Ubuntu and old 
mdadm are common but this clearly isn't that ...

Please give us the information that page asks for - it probably won't 
help much, but some things sometimes jump out ...

Cheers,
Wol

On 06/03/2021 11:36, apfc123@gmail.com wrote:
Hello,

Reshape is currently stalled at 58%. If I reboot the system, the array
is started in auto-read-only mode with resync pending. I can freeze
the sync and mount the filesystem read only to access the data.

When it first stalled and rebooted, I ran extended smart tests on all
18 drives and one came back with read error. I ddrescued it to a new
one (99.99% rescued) and swapped it out, but the reshape still stalls
immediately when setting the array to --readwrite.

The raid5 array started out with 12 drives. I added 6 more drives then
grew it to 18 drives and raid level 6 at the same time. This migration
was started with mdadm 4.1 running on kernel 4.19. I've tried booting
with debian testing running kernel 5.10 (didn't check mdadm version),
and also archlinux running 5.11 but with the same results.

/dev/md0:
            Version : 1.2
      Creation Time : Tue Dec 17 01:51:38 2019
         Raid Level : raid6
         Array Size : 42975736320 (40984.86 GiB 44007.15 GB)
      Used Dev Size : 3906885120 (3725.90 GiB 4000.65 GB)
       Raid Devices : 18
      Total Devices : 18
        Persistence : Superblock is persistent

      Intent Bitmap : Internal

        Update Time : Sat Mar  6 09:41:58 2021
              State : clean, degraded, resyncing (PENDING)
     Active Devices : 17
    Working Devices : 18
     Failed Devices : 0
      Spare Devices : 1

             Layout : left-symmetric-6
         Chunk Size : 512K

Consistency Policy : bitmap

      Delta Devices : 5, (13->18)
         New Layout : left-symmetric

               Name : debian:0  (local to host debian)
               UUID : 2a0d5568:ea53b429:30df79c9:e7559668
             Events : 303246

     Number   Major   Minor   RaidDevice State
        0       8      129        0      active sync   /dev/sdi1
        1       8       49        1      active sync   /dev/sdd1
        2       8      209        2      active sync   /dev/sdn1
        3       8        1        3      active sync   /dev/sda1
        4       8       65        4      active sync   /dev/sde1
        5       8      145        5      active sync   /dev/sdj1
        6      65       17        6      active sync   /dev/sdr1
        7       8      113        7      active sync   /dev/sdh1
        8      65        1        8      active sync   /dev/sdq1
        9       8       81        9      active sync   /dev/sdf1
       10       8       17       10      active sync   /dev/sdb1
       12       8      193       11      active sync   /dev/sdm1
       18       8      241       12      spare rebuilding   /dev/sdp1
       17       8      225       13      active sync   /dev/sdo1
       16       8      177       14      active sync   /dev/sdl1
       15       8      161       15      active sync   /dev/sdk1
       14       8       97       16      active sync   /dev/sdg1
       13       8       33       17      active sync   /dev/sdc1

One of the entries from dmesg the first time reshaping stalled:

[105003.994653] INFO: task md0_reshape:3296 blocked for more than 120 seconds.
[105003.994916]       Tainted: G          I       4.19.0-6-amd64 #1
Debian 4.19.67-2+deb10u1
[105003.995169] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[105003.995434] md0_reshape     D    0  3296      2 0x80000000
[105003.995436] Call Trace:
[105003.995441]  ? __schedule+0x2a2/0x870
[105003.995442]  schedule+0x28/0x80
[105003.995448]  reshape_request+0x862/0x940 [raid456]
[105003.995451]  ? finish_wait+0x80/0x80
[105003.995454]  raid5_sync_request+0x34a/0x3b0 [raid456]
[105003.995460]  md_do_sync.cold.86+0x3f4/0x911 [md_mod]
[105003.995461]  ? finish_wait+0x80/0x80
[105003.995464]  ? __switch_to_asm+0x35/0x70
[105003.995467]  ? md_rdev_init+0xb0/0xb0 [md_mod]
[105003.995471]  md_thread+0x94/0x150 [md_mod]
[105003.995473]  kthread+0x112/0x130
[105003.995475]  ? kthread_bind+0x30/0x30
[105003.995476]  ret_from_fork+0x35/0x40

I'm not sure where to continue troubleshooting. Been moving drives
around in the storage appliance in case there are bad ports on the
backplane but doesn't seem to make any difference. I only have one
4-port HBA right now so can't even try another. The storage appliance
has 2 controllers and already tried swapping them as well as the SAS
cables. Only thing left I can try hardware wise is to install the
interposers that go in between the drives and the backplane but not
very hopeful.

Any help would be greatly appreciated. I don't have the extra space
right now to copy everything out and create a new array so really
hoping to get past this stalling issue. Thanks.

Re: Raid5 to Raid6 reshape stalled

From: <hidden>
Date: 2021-03-06 18:46:08

Thanks, info below.

Linux debian 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1
(2019-09-20) x86_64 GNU/Linux
mdadm - v4.1 - 2018-10-01

/dev/sda
=== START OF INFORMATION SECTION ===
Device Model:     HITACHI HUS724040ALE640
Serial Number:    PBJBNNET
LU WWN Device Id: 5 000cca 23de17ca4
Firmware Version: MJAONS04
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:45:04 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdb
=== START OF INFORMATION SECTION ===
Device Model:     MB4000GCWDC
Serial Number:    Z1Z8YWB0
LU WWN Device Id: 5 000c50 07ba725b1
Firmware Version: HPGH
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 6
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:46:12 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdc
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PCHP96XB
LU WWN Device Id: 5 000cca 24cd7c5eb
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:46:39 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdd
=== START OF INFORMATION SECTION ===
Device Model:     WL4000GSA6472E
Serial Number:    WOL240331724
LU WWN Device Id: 5 0014ee 0588c0835
Firmware Version: A.01
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Size:      512 bytes logical/physical
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:46:58 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sde
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PCGSLX3B
LU WWN Device Id: 5 000cca 24ccabb82
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:47:15 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdf
=== START OF INFORMATION SECTION ===
Device Model:     HITACHI HUS724040ALE640
Serial Number:    PAGLKHEW
LU WWN Device Id: 5 000cca 22bc8705d
Firmware Version: MJAONS04
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:47:31 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdg
=== START OF INFORMATION SECTION ===
Device Model:     MB4000GCWDC
Serial Number:    Z1Z8YWJN
LU WWN Device Id: 5 000c50 07ba717cf
Firmware Version: HPGH
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 6
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:47:46 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdh
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PCGK79AB
LU WWN Device Id: 5 000cca 24cc7d5b7
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:48:01 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdi
=== START OF INFORMATION SECTION ===
Model Family:     Toshiba 3.5" MG03ACAxxx(Y) Enterprise HDD
Device Model:     TOSHIBA MG03ACA400
Serial Number:    5443K65YF
LU WWN Device Id: 5 000039 58b8009aa
Firmware Version: FL1A
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:48:15 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdj
=== START OF INFORMATION SECTION ===
Device Model:     WL4000GSA6472E
Serial Number:    WOL240332040
LU WWN Device Id: 5 0014ee 25ddc3495
Firmware Version: 01.01A01
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:48:28 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdk
=== START OF INFORMATION SECTION ===
Device Model:     MB4000GCWDC
Serial Number:    Z1Z8XQ9J
LU WWN Device Id: 5 000c50 07b9764b6
Firmware Version: HPGH
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 6
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:48:41 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdl
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PAJWABKT
LU WWN Device Id: 5 000cca 22be89bf7
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:48:54 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdm
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PCG1JAVB
LU WWN Device Id: 5 000cca 24cc0b1bf
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:49:06 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdn
=== START OF INFORMATION SECTION ===
Device Model:     HITACHI HUS724040ALE640
Serial Number:    PAJK4VMS
LU WWN Device Id: 5 000cca 22be3fb8e
Firmware Version: MJAONS04
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:49:22 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdo
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PCG62VNB
LU WWN Device Id: 5 000cca 24cc2c4f6
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:49:34 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdp
=== START OF INFORMATION SECTION ===
Model Family:     Hitachi/HGST Ultrastar 7K4000
Device Model:     Hitachi HUS724040ALE641
Serial Number:    PCGSNTTB
LU WWN Device Id: 5 000cca 24ccac29d
Firmware Version: MJAOA5F0
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Mar  6 17:49:53 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdq
=== START OF INFORMATION SECTION ===
Device Model:     HITACHI HUS724040ALE640
Serial Number:    PAGTSZES
LU WWN Device Id: 5 000cca 22bcb42ee
Firmware Version: MJAONS04
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:50:05 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)

/dev/sdr
=== START OF INFORMATION SECTION ===
Device Model:     WL4000GSA6472E
Serial Number:    WOL240331985
LU WWN Device Id: 5 0014ee 003311232
Firmware Version: 01.01A01
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sat Mar  6 17:50:18 2021 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)



/dev/sda:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sda1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x4d
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 220e5a63:3311984e:f28d4b05:593c684e

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors - bad
blocks present.
       Checksum : 6c62a047 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 3
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdb:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdb1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : c9b754df:84118329:c4e1a36b:bd4c7f83

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 5eb7ae75 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 10
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdc:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdc1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 0b7f323c:5bcbd1c3:89ef2cd2:fa501410

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 49024193 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 17
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdd:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdd1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 8c0905ef:8e190062:0a5135ab:5ca3cfa0

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 3c6ce1f - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sde:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sde1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 896fcc0c:f8b4b6ab:d8056a44:558d0093

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : f6aa6e5a - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 14
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdf:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdf1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : a9bbd48d:24117e4b:f0b0c881:4765bc46

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 89499a5 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 4
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdg:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdg1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 01be0b84:bc5ab713:b1352502:de23ddfa

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : fb8228f1 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 9
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdh:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdh1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 32f81397:6f0115a4:c3fa2d02:c078170e

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : b22b23ce - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 16
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdi:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdi1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 0afa52a2:0f7f4f1f:14e924da:d06d9015

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 181486a1 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 7
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdj:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdj1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : db1d31c6:cde52a67:9e4c48cc:18bc5dcb

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 2bbec2fc - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdk:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdk1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x4d
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 3d9fab1f:172871cc:02215dee:f6c525be

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors - bad
blocks present.
       Checksum : ff5c655d - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 11
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdl:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdl1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x4d
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 114ed6e6:9ab8d767:1fcfeacb:4c408814

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors - bad
blocks present.
       Checksum : 95de0ba8 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 5
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdm:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdm1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : c8daba50:67137919:9bead1ab:88d3d498

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 159762fe - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 15
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdn:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdn1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : b0893bc1:40c9b3ad:fdf4f722:3acef4c6

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : bf98ccc6 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 2
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdo:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdo1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : c07db065:7316a61b:aac57004:2641fc5f

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 4c8051b0 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 13
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdp:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdp1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x47
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
Recovery Offset : 4561114112 sectors
          State : active
    Device UUID : 5843bab9:17b0f8ae:f7712bee:41a23f6c

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 39b7d25a - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 12
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdq:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdq1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x45
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : 45b14d19:6d4b9afc:e51c3747:c46230b8

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors
       Checksum : 7c0c3300 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 8
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

/dev/sdr:
   MBR Magic : aa55
Partition[0] :   4294967295 sectors at            1 (type ee)
/dev/sdr1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x4d
     Array UUID : 2a0d5568:ea53b429:30df79c9:e7559668
           Name : debian:0  (local to host debian)
  Creation Time : Tue Dec 17 01:51:38 2019
     Raid Level : raid6
   Raid Devices : 18

 Avail Dev Size : 7813770895 (3725.90 GiB 4000.65 GB)
     Array Size : 62510161920 (59614.34 GiB 64010.41 GB)
  Used Dev Size : 7813770240 (3725.90 GiB 4000.65 GB)
    Data Offset : 264192 sectors
     New Offset : 247808 sectors
   Super Offset : 8 sectors
          State : active
    Device UUID : f27bbac9:00333c9b:c68170ea:a3507ccd

Internal Bitmap : 8 sectors from superblock
  Reshape pos'n : 36488912896 (34798.54 GiB 37364.65 GB)
  Delta Devices : 5 (13->18)
     New Layout : left-symmetric

    Update Time : Sat Mar  6 17:30:59 2021
  Bad Block Log : 512 entries available at offset 24 sectors - bad
blocks present.
       Checksum : 83a03807 - correct
         Events : 303248

         Layout : left-symmetric-6
     Chunk Size : 512K

   Device Role : Active device 6
   Array State : AAAAAAAAAAAAAAAAAA ('A' == active, '.' == missing,
'R' == replacing)

lsdrv
**Warning** The following utility(ies) failed to execute:
  sginfo
  lsusb
Some information may be missing.

PCI [mpt3sas] 05:00.0 Serial Attached SCSI controller: LSI Logic /
Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)
└scsi 0:x:x:x [Empty]
PCI [ata_piix] 00:1f.2 IDE interface: Intel Corporation 82801JI (ICH10
Family) 4 port SATA IDE Controller #1
└scsi 1:x:x:x [Empty]
PCI [ata_piix] 00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10
Family) 2 port SATA IDE Controller #2
└scsi 3:x:x:x [Empty]
PCI [pata_marvell] 09:00.0 IDE interface: Marvell Technology Group
Ltd. 88SE6121 SATA II / PATA Controller (rev b2)
└scsi 5:x:x:x [Empty]
USB [usb-storage]  {13618102022400B0}
└scsi 8:0:0:0 ADATA    USB Flash Drive
 └sds 7.24g [65:32] Partitioned (dos)
  ├sds1 1.24g [65:33] vfat 'D-LIVE_10_2' {3E9E-7588}
  │├Mounted as /dev/sds1 @ /run/live/persistence/sds1
  │└Mounted as /dev/sds1 @ /usr/lib/live/mount/persistence/sds1
  └sds2 6.00g [65:34] ext3 'persistence' {bfde904d-48e4-3741-969a-5ad1f0033243}
   ├Mounted as /dev/sds2 @ /run/live/persistence/sds2
   └Mounted as /dev/sds2 @ /usr/lib/live/mount/persistence/sds2
PCI [mpt3sas] 07:00.0 Serial Attached SCSI controller: LSI Logic /
Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)
├phy-7:0:12 scsi 7:0:0:0 ATA      HITACHI HUS72404 {PBJBNNET}
│└sda 3.64t [8:0] Partitioned (gpt)
│ └sda1 3.64t [8:1] MD raid6 (3/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│   │                PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
│   └VG super 40.02t 0 free {EqBsuH-weZl-urAI-aO2f-PiO6-rAO3-J8m1F9}
│    ├dm-1 39.73t [253:1] LV nova ext4 {d1359e47-522e-41f5-bb38-8d8d40826e9e}
│    └dm-0 300.00g [253:0] LV star ext4 {dde10d6e-5e4d-4196-8abe-d36d863c97cd}
├phy-7:0:14 scsi 7:0:1:0 ATA      MB4000GCWDC      {Z1Z8YWB0}
│└sdb 3.64t [8:16] Partitioned (gpt)
│ └sdb1 3.64t [8:17] MD raid6 (10/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:15 scsi 7:0:2:0 ATA      Hitachi HUS72404 {PCHP96XB}
│└sdc 3.64t [8:32] Partitioned (gpt)
│ └sdc1 3.64t [8:33] MD raid6 (17/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:18 scsi 7:0:3:0 ATA      WL4000GSA6472E   {WOL240331724}
│└sdd 3.64t [8:48] Partitioned (gpt)
│ └sdd1 3.64t [8:49] MD raid6 (1/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:19 scsi 7:0:4:0 ATA      HITACHI HUS72404 {PAGLKHEW}
│└sdf 3.64t [8:80] Partitioned (gpt)
│ └sdf1 3.64t [8:81] MD raid6 (4/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:20 scsi 7:0:5:0 ATA      MB4000GCWDC      {Z1Z8YWJN}
│└sdg 3.64t [8:96] Partitioned (gpt)
│ └sdg1 3.64t [8:97] MD raid6 (9/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:21 scsi 7:0:6:0 ATA      Hitachi HUS72404 {PCGK79AB}
│└sdh 3.64t [8:112] Partitioned (gpt)
│ └sdh1 3.64t [8:113] MD raid6 (16/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:23 scsi 7:0:7:0 ATA      TOSHIBA MG03ACA4 {5443K65YF}
│└sdi 3.64t [8:128] Partitioned (gpt)
│ └sdi1 3.64t [8:129] MD raid6 (7/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:25 scsi 7:0:8:0 ATA      WL4000GSA6472E   {WOL240332040}
│└sdj 3.64t [8:144] Partitioned (gpt)
│ └sdj1 3.64t [8:145] MD raid6 (0/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:26 scsi 7:0:9:0 ATA      Hitachi HUS72404 {PAJWABKT}
│└sdl 3.64t [8:176] Partitioned (gpt)
│ └sdl1 3.64t [8:177] MD raid6 (5/18 (13)) (w/
sdo1,sdn1,sdm1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:27 scsi 7:0:10:0 ATA      Hitachi HUS72404 {PCG1JAVB}
│└sdm 3.64t [8:192] Partitioned (gpt)
│ └sdm1 3.64t [8:193] MD raid6 (15/18 (13)) (w/
sdo1,sdn1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:28 scsi 7:0:11:0 ATA      Hitachi HUS72404 {PCGSLX3B}
│└sde 3.64t [8:64] Partitioned (gpt)
│ └sde1 3.64t [8:65] MD raid6 (14/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:29 scsi 7:0:12:0 ATA      MB4000GCWDC      {Z1Z8XQ9J}
│└sdk 3.64t [8:160] Partitioned (gpt)
│ └sdk1 3.64t [8:161] MD raid6 (11/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:30 scsi 7:0:13:0 ATA      HITACHI HUS72404 {PAJK4VMS}
│└sdn 3.64t [8:208] Partitioned (gpt)
│ └sdn1 3.64t [8:209] MD raid6 (2/18 (13)) (w/
sdo1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:31 scsi 7:0:14:0 ATA      Hitachi HUS72404 {PCG62VNB}
│└sdo 3.64t [8:224] Partitioned (gpt)
│ └sdo1 3.64t [8:225] MD raid6 (13/18 (13)) (w/
sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:32 scsi 7:0:15:0 ATA      Hitachi HUS72404 {PCGSNTTB}
│└sdp 3.64t [8:240] Partitioned (gpt)
│ └sdp1 3.64t [8:241] MD raid6 (12/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sdq1,sda1)
spare 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
├phy-7:0:33 scsi 7:0:16:0 ATA      HITACHI HUS72404 {PAGTSZES}
│└sdq 3.64t [65:0] Partitioned (gpt)
│ └sdq1 3.64t [65:1] MD raid6 (8/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdr1,sdb1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
│  └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
│                    PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
└phy-7:0:34 scsi 7:0:17:0 ATA      WL4000GSA6472E   {WOL240331985}
 └sdr 3.64t [65:16] Partitioned (gpt)
  └sdr1 3.64t [65:17] MD raid6 (6/18 (13)) (w/
sdo1,sdn1,sdm1,sdl1,sdk1,sdj1,sdi1,sdh1,sdg1,sdf1,sde1,sdd1,sdc1,sdb1,sdq1,sda1,sdp1)
in_sync 'debian:0' {2a0d5568-ea53-b429-30df-79c9e7559668}
   └md0 40.02t [9:0] MD v1.2 raid6 (18 (13)) read-auto DEGRADED, 512k
Chunk {2a0d5568:ea53b429:30df79c9:e7559668}
                     PV LVM2_member 40.02t used, 0 free
{HUYjPl-6dU0-53un-71iH-1MAx-dEMU-HtvuV0}
Other Block Devices
├loop0 610.27m [7:0] squashfs
│├Mounted as /dev/loop0 @ /run/live/rootfs/filesystem.squashfs
│└Mounted as /dev/loop0 @ /usr/lib/live/mount/rootfs/filesystem.squashfs
├loop1 0.00k [7:1] Empty/Unknown
├loop2 0.00k [7:2] Empty/Unknown
├loop3 0.00k [7:3] Empty/Unknown
├loop4 0.00k [7:4] Empty/Unknown
├loop5 0.00k [7:5] Empty/Unknown
├loop6 0.00k [7:6] Empty/Unknown
└loop7 0.00k [7:7] Empty/Unknown

mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active (auto-read-only) raid6 sde1[16] sda1[3] sdj1[0] sdr1[6]
sdl1[5] sdi1[7] sdf1[4] sdo1[17] sdh1[14] sdq1[8] sdc1[13] sdn1[2]
sdm1[15] sdd1[1] sdp1[18] sdg1[9] sdk1[12] sdb1[10]
      42975736320 blocks super 1.2 level 6, 512k chunk, algorithm 18
[18/17] [UUUUUUUUUUUU_UUUUU]
          resync=PENDING
      bitmap: 17/30 pages [68KB], 65536KB chunk

unused devices: <none>

Half the drives actually had SCT/ECR disabled. I ran the script which
set all the drives to 7s and tried reshaping again but still stalling.

On Sat, Mar 6, 2021 at 1:20 PM antlists [off-list ref] wrote:
https://raid.wiki.kernel.org/index.php/Linux_Raid#When_Things_Go_Wrogn

You've obviously covered some of this - glitches with Ubuntu and old
mdadm are common but this clearly isn't that ...

Please give us the information that page asks for - it probably won't
help much, but some things sometimes jump out ...

Cheers,
Wol

On 06/03/2021 11:36, apfc123@gmail.com wrote:
quoted
Hello,

Reshape is currently stalled at 58%. If I reboot the system, the array
is started in auto-read-only mode with resync pending. I can freeze
the sync and mount the filesystem read only to access the data.

When it first stalled and rebooted, I ran extended smart tests on all
18 drives and one came back with read error. I ddrescued it to a new
one (99.99% rescued) and swapped it out, but the reshape still stalls
immediately when setting the array to --readwrite.

The raid5 array started out with 12 drives. I added 6 more drives then
grew it to 18 drives and raid level 6 at the same time. This migration
was started with mdadm 4.1 running on kernel 4.19. I've tried booting
with debian testing running kernel 5.10 (didn't check mdadm version),
and also archlinux running 5.11 but with the same results.

/dev/md0:
            Version : 1.2
      Creation Time : Tue Dec 17 01:51:38 2019
         Raid Level : raid6
         Array Size : 42975736320 (40984.86 GiB 44007.15 GB)
      Used Dev Size : 3906885120 (3725.90 GiB 4000.65 GB)
       Raid Devices : 18
      Total Devices : 18
        Persistence : Superblock is persistent

      Intent Bitmap : Internal

        Update Time : Sat Mar  6 09:41:58 2021
              State : clean, degraded, resyncing (PENDING)
     Active Devices : 17
    Working Devices : 18
     Failed Devices : 0
      Spare Devices : 1

             Layout : left-symmetric-6
         Chunk Size : 512K

Consistency Policy : bitmap

      Delta Devices : 5, (13->18)
         New Layout : left-symmetric

               Name : debian:0  (local to host debian)
               UUID : 2a0d5568:ea53b429:30df79c9:e7559668
             Events : 303246

     Number   Major   Minor   RaidDevice State
        0       8      129        0      active sync   /dev/sdi1
        1       8       49        1      active sync   /dev/sdd1
        2       8      209        2      active sync   /dev/sdn1
        3       8        1        3      active sync   /dev/sda1
        4       8       65        4      active sync   /dev/sde1
        5       8      145        5      active sync   /dev/sdj1
        6      65       17        6      active sync   /dev/sdr1
        7       8      113        7      active sync   /dev/sdh1
        8      65        1        8      active sync   /dev/sdq1
        9       8       81        9      active sync   /dev/sdf1
       10       8       17       10      active sync   /dev/sdb1
       12       8      193       11      active sync   /dev/sdm1
       18       8      241       12      spare rebuilding   /dev/sdp1
       17       8      225       13      active sync   /dev/sdo1
       16       8      177       14      active sync   /dev/sdl1
       15       8      161       15      active sync   /dev/sdk1
       14       8       97       16      active sync   /dev/sdg1
       13       8       33       17      active sync   /dev/sdc1

One of the entries from dmesg the first time reshaping stalled:

[105003.994653] INFO: task md0_reshape:3296 blocked for more than 120 seconds.
[105003.994916]       Tainted: G          I       4.19.0-6-amd64 #1
Debian 4.19.67-2+deb10u1
[105003.995169] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[105003.995434] md0_reshape     D    0  3296      2 0x80000000
[105003.995436] Call Trace:
[105003.995441]  ? __schedule+0x2a2/0x870
[105003.995442]  schedule+0x28/0x80
[105003.995448]  reshape_request+0x862/0x940 [raid456]
[105003.995451]  ? finish_wait+0x80/0x80
[105003.995454]  raid5_sync_request+0x34a/0x3b0 [raid456]
[105003.995460]  md_do_sync.cold.86+0x3f4/0x911 [md_mod]
[105003.995461]  ? finish_wait+0x80/0x80
[105003.995464]  ? __switch_to_asm+0x35/0x70
[105003.995467]  ? md_rdev_init+0xb0/0xb0 [md_mod]
[105003.995471]  md_thread+0x94/0x150 [md_mod]
[105003.995473]  kthread+0x112/0x130
[105003.995475]  ? kthread_bind+0x30/0x30
[105003.995476]  ret_from_fork+0x35/0x40

I'm not sure where to continue troubleshooting. Been moving drives
around in the storage appliance in case there are bad ports on the
backplane but doesn't seem to make any difference. I only have one
4-port HBA right now so can't even try another. The storage appliance
has 2 controllers and already tried swapping them as well as the SAS
cables. Only thing left I can try hardware wise is to install the
interposers that go in between the drives and the backplane but not
very hopeful.

Any help would be greatly appreciated. I don't have the extra space
right now to copy everything out and create a new array so really
hoping to get past this stalling issue. Thanks.
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