Thread (5 messages) 5 messages, 3 authors, 2022-06-09

Re: MD Array Unexpected Kernel Hang

From: Alan Braithwaite <hidden>
Date: 2022-06-09 00:26:19

Appreciated.  Only reason I didn't include it initially is because it's a giant wall of text (which the other debugging info was anyway, so I should have just been proactive).

Anyway, it can now be found below, annotated with the failing drives first.

Thanks,
- Alan



First 2 (sdg, sdh) are the "bad" drives which cause the md hangs when added to the array.  sdh looks particularly healthy to my reading of the output, but was still causing the issues. 


[root@ceres tmp]# sudo smartctl -x /dev/sdg
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-5.17.9-arch1-1] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              HUS724020ALS640
Revision:             A1C4
Compliance:           SPC-4
User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
LU is resource provisioned, LBPRZ=0
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca06d287590
Serial number:        P5GR7TBV
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Wed Jun  8 17:22:20 2022 PDT
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled
Read Cache is:        Enabled
Writeback Cache is:   Disabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Current Drive Temperature:     42 C
Drive Trip Temperature:        85 C

Manufactured in week 21 of year 2015
Specified cycle count over device lifetime:  50000
Accumulated start-stop cycles:  32
Specified load-unload count over device lifetime:  600000
Accumulated load-unload cycles:  1530
Elements in grown defect list: 0

Vendor (Seagate Cache) information
  Blocks sent to initiator = 12276642395193344

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:     110826       19         0    110845    1515087     460659.950           0
write:         0        0         0         0     972273      44976.018           0
verify:        0        0         0         0      58029          0.000           0

Non-medium error count:        0

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -   39609                 - [-   -    -]

Long (extended) Self-test duration: 22236 seconds [6.2 hours]

Background scan results log
  Status: waiting until BMS interval timer expires
    Accumulated power on time, hours:minutes 39704:24 [2382264 minutes]
    Number of background scans performed: 62,  scan progress: 0.00%
    Number of background medium scans performed: 62


Protocol Specific port log page for SAS SSP
relative target port id = 1
  generation code = 1
  number of phys = 1
  phy identifier = 0
    attached device type: no device attached
    attached reason: unknown
    reason: power on
    negotiated logical link rate: phy enabled; unknown
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=0
    SAS address = 0x5000cca06d287591
    attached SAS address = 0x0
    attached phy identifier = 0
    Invalid DWORD count = 0
    Running disparity error count = 0
    Loss of DWORD synchronization count = 0
    Phy reset problem count = 0
relative target port id = 2
  generation code = 1
  number of phys = 1
  phy identifier = 1
    attached device type: expander device
    attached reason: SMP phy control function
    reason: unknown
    negotiated logical link rate: phy enabled; 6 Gbps
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=1
    SAS address = 0x5000cca06d287592
    attached SAS address = 0x50030480003954bf
    attached phy identifier = 14
    Invalid DWORD count = 10
    Running disparity error count = 10
    Loss of DWORD synchronization count = 2
    Phy reset problem count = 0

[root@ceres tmp]# sudo smartctl -x /dev/sdh
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-5.17.9-arch1-1] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              HUS724020ALS640
Revision:             A2C0
Compliance:           SPC-4
User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
LU is fully provisioned
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca06d3da1bc
Serial number:        P5H2WSDV
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Wed Jun  8 17:22:25 2022 PDT
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled
Read Cache is:        Enabled
Writeback Cache is:   Enabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Current Drive Temperature:     41 C
Drive Trip Temperature:        85 C

Manufactured in week 28 of year 2015
Specified cycle count over device lifetime:  50000
Accumulated start-stop cycles:  23
Specified load-unload count over device lifetime:  600000
Accumulated load-unload cycles:  1512
Elements in grown defect list: 0

Vendor (Seagate Cache) information
  Blocks sent to initiator = 386113231388672

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:        525        2         0       527        222       4203.269           0
write:         0        0         0         0       4103      13423.670           0
verify:        0        0         0         0      11426          0.000           0

Non-medium error count:        1

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -   39221                 - [-   -    -]
# 2  Background short  Completed                   -   34658                 - [-   -    -]
# 3  Background short  Completed                   -   32405                 - [-   -    -]
# 4  Background short  Completed                   -   32380                 - [-   -    -]
# 5  Background short  Completed                   -   32357                 - [-   -    -]
# 6  Background short  Completed                   -   32332                 - [-   -    -]
# 7  Background short  Completed                   -   32308                 - [-   -    -]
# 8  Background short  Completed                   -   32285                 - [-   -    -]
# 9  Background short  Completed                   -   32260                 - [-   -    -]
#10  Background short  Completed                   -   32237                 - [-   -    -]
#11  Background short  Completed                   -   32213                 - [-   -    -]
#12  Background short  Completed                   -   32189                 - [-   -    -]
#13  Background short  Completed                   -   32165                 - [-   -    -]
#14  Background short  Completed                   -   32141                 - [-   -    -]
#15  Background short  Completed                   -   32117                 - [-   -    -]
#16  Background short  Completed                   -   32093                 - [-   -    -]
#17  Background short  Completed                   -   32068                 - [-   -    -]
#18  Background short  Completed                   -   32045                 - [-   -    -]
#19  Background short  Completed                   -   32020                 - [-   -    -]
#20  Background short  Completed                   -   31997                 - [-   -    -]

Long (extended) Self-test duration: 22650 seconds [6.3 hours]

Background scan results log
  Status: waiting until BMS interval timer expires
    Accumulated power on time, hours:minutes 39315:59 [2358959 minutes]
    Number of background scans performed: 243,  scan progress: 0.00%
    Number of background medium scans performed: 243


Protocol Specific port log page for SAS SSP
relative target port id = 1
  generation code = 1
  number of phys = 1
  phy identifier = 0
    attached device type: no device attached
    attached reason: unknown
    reason: power on
    negotiated logical link rate: phy enabled; unknown
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=0
    SAS address = 0x5000cca06d3da1bd
    attached SAS address = 0x0
    attached phy identifier = 0
    Invalid DWORD count = 0
    Running disparity error count = 0
    Loss of DWORD synchronization count = 0
    Phy reset problem count = 0
relative target port id = 2
  generation code = 1
  number of phys = 1
  phy identifier = 1
    attached device type: expander device
    attached reason: SMP phy control function
    reason: unknown
    negotiated logical link rate: phy enabled; 6 Gbps
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=1
    SAS address = 0x5000cca06d3da1be
    attached SAS address = 0x50030480003954bf
    attached phy identifier = 15
    Invalid DWORD count = 18
    Running disparity error count = 16
    Loss of DWORD synchronization count = 3
    Phy reset problem count = 0



# --- Good Drives Start Here ---

[root@ceres tmp]# sudo smartctl -x /dev/sdc
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-5.17.9-arch1-1] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              HUS724020ALS640
Revision:             A1C4
Compliance:           SPC-4
User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
LU is resource provisioned, LBPRZ=0
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca06d2927fc
Serial number:        P5GRMNRV
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Wed Jun  8 17:22:31 2022 PDT
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled
Read Cache is:        Enabled
Writeback Cache is:   Disabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Current Drive Temperature:     44 C
Drive Trip Temperature:        85 C

Manufactured in week 21 of year 2015
Specified cycle count over device lifetime:  50000
Accumulated start-stop cycles:  33
Specified load-unload count over device lifetime:  600000
Accumulated load-unload cycles:  2019
Elements in grown defect list: 0

Vendor (Seagate Cache) information
  Blocks sent to initiator = 12460064392609792

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:     125617        4         0    125621    1511670     470203.046           0
write:         0        0         0         0     311583      46916.011           0
verify:        0        0         0         0       1226          0.000           0

Non-medium error count:        0

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -   39776                 - [-   -    -]
# 2  Background short  Completed                   -   39480                 - [-   -    -]

Long (extended) Self-test duration: 22236 seconds [6.2 hours]

Background scan results log
  Status: waiting until BMS interval timer expires
    Accumulated power on time, hours:minutes 39871:02 [2392262 minutes]
    Number of background scans performed: 65,  scan progress: 0.00%
    Number of background medium scans performed: 65


Protocol Specific port log page for SAS SSP
relative target port id = 1
  generation code = 1
  number of phys = 1
  phy identifier = 0
    attached device type: no device attached
    attached reason: unknown
    reason: power on
    negotiated logical link rate: phy enabled; unknown
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=0
    SAS address = 0x5000cca06d2927fd
    attached SAS address = 0x0
    attached phy identifier = 0
    Invalid DWORD count = 0
    Running disparity error count = 0
    Loss of DWORD synchronization count = 0
    Phy reset problem count = 0
relative target port id = 2
  generation code = 1
  number of phys = 1
  phy identifier = 1
    attached device type: expander device
    attached reason: SMP phy control function
    reason: unknown
    negotiated logical link rate: phy enabled; 6 Gbps
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=1
    SAS address = 0x5000cca06d2927fe
    attached SAS address = 0x50030480003954bf
    attached phy identifier = 9
    Invalid DWORD count = 11
    Running disparity error count = 10
    Loss of DWORD synchronization count = 2
    Phy reset problem count = 0

[root@ceres tmp]# sudo smartctl -x /dev/sdd
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-5.17.9-arch1-1] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              HUS724020ALS640
Revision:             A1C4
Compliance:           SPC-4
User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
LU is resource provisioned, LBPRZ=0
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca06d2924f0
Serial number:        P5GRMGEV
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Wed Jun  8 17:22:32 2022 PDT
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled
Read Cache is:        Enabled
Writeback Cache is:   Disabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Current Drive Temperature:     44 C
Drive Trip Temperature:        85 C

Manufactured in week 21 of year 2015
Specified cycle count over device lifetime:  50000
Accumulated start-stop cycles:  33
Specified load-unload count over device lifetime:  600000
Accumulated load-unload cycles:  2031
Elements in grown defect list: 0

Vendor (Seagate Cache) information
  Blocks sent to initiator = 12182041999179776

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:     284059        0         0    284059    1507556     472213.429           0
write:         0        0         0         0     378639      45073.915           0
verify:        0        0         0         0        319          0.000           0

Non-medium error count:        0

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -   39775                 - [-   -    -]
# 2  Background short  Completed                   -   39479                 - [-   -    -]

Long (extended) Self-test duration: 22236 seconds [6.2 hours]

Background scan results log
  Status: waiting until BMS interval timer expires
    Accumulated power on time, hours:minutes 39870:03 [2392203 minutes]
    Number of background scans performed: 63,  scan progress: 0.00%
    Number of background medium scans performed: 63


Protocol Specific port log page for SAS SSP
relative target port id = 1
  generation code = 1
  number of phys = 1
  phy identifier = 0
    attached device type: no device attached
    attached reason: unknown
    reason: power on
    negotiated logical link rate: phy enabled; unknown
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=0
    SAS address = 0x5000cca06d2924f1
    attached SAS address = 0x0
    attached phy identifier = 0
    Invalid DWORD count = 0
    Running disparity error count = 0
    Loss of DWORD synchronization count = 0
    Phy reset problem count = 0
relative target port id = 2
  generation code = 1
  number of phys = 1
  phy identifier = 1
    attached device type: expander device
    attached reason: SMP phy control function
    reason: unknown
    negotiated logical link rate: phy enabled; 6 Gbps
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=1
    SAS address = 0x5000cca06d2924f2
    attached SAS address = 0x50030480003954bf
    attached phy identifier = 10
    Invalid DWORD count = 10
    Running disparity error count = 10
    Loss of DWORD synchronization count = 2
    Phy reset problem count = 0

[root@ceres tmp]# sudo smartctl -x /dev/sde
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-5.17.9-arch1-1] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              HUS724020ALS640
Revision:             A1C4
Compliance:           SPC-4
User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
LU is resource provisioned, LBPRZ=0
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca06d283b08
Serial number:        P5GR3WJV
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Wed Jun  8 17:22:34 2022 PDT
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled
Read Cache is:        Enabled
Writeback Cache is:   Disabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Current Drive Temperature:     41 C
Drive Trip Temperature:        85 C

Manufactured in week 21 of year 2015
Specified cycle count over device lifetime:  50000
Accumulated start-stop cycles:  33
Specified load-unload count over device lifetime:  600000
Accumulated load-unload cycles:  2024
Elements in grown defect list: 0

Vendor (Seagate Cache) information
  Blocks sent to initiator = 12291100328853504

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:      72338        1         0     72339    1454480     468885.996           0
write:         0        0         0         0     283314      44839.275           0
verify:        0        0         0         0        754          0.000           0

Non-medium error count:        0

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -   39775                 - [-   -    -]
# 2  Background short  Completed                   -   39479                 - [-   -    -]

Long (extended) Self-test duration: 22236 seconds [6.2 hours]

Background scan results log
  Status: waiting until BMS interval timer expires
    Accumulated power on time, hours:minutes 39870:31 [2392231 minutes]
    Number of background scans performed: 62,  scan progress: 0.00%
    Number of background medium scans performed: 62


Protocol Specific port log page for SAS SSP
relative target port id = 1
  generation code = 1
  number of phys = 1
  phy identifier = 0
    attached device type: no device attached
    attached reason: unknown
    reason: power on
    negotiated logical link rate: phy enabled; unknown
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=0
    SAS address = 0x5000cca06d283b09
    attached SAS address = 0x0
    attached phy identifier = 0
    Invalid DWORD count = 0
    Running disparity error count = 0
    Loss of DWORD synchronization count = 0
    Phy reset problem count = 0
relative target port id = 2
  generation code = 1
  number of phys = 1
  phy identifier = 1
    attached device type: expander device
    attached reason: SMP phy control function
    reason: unknown
    negotiated logical link rate: phy enabled; 6 Gbps
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=1
    SAS address = 0x5000cca06d283b0a
    attached SAS address = 0x50030480003954bf
    attached phy identifier = 11
    Invalid DWORD count = 9
    Running disparity error count = 9
    Loss of DWORD synchronization count = 2
    Phy reset problem count = 0

[root@ceres tmp]# sudo smartctl -x /dev/sdf
smartctl 7.3 2022-02-28 r5338 [x86_64-linux-5.17.9-arch1-1] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              HUS724020ALS640
Revision:             A2C0
Compliance:           SPC-4
User Capacity:        2,000,398,934,016 bytes [2.00 TB]
Logical block size:   512 bytes
LU is fully provisioned
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca0284dc068
Serial number:        P6HBSKZV
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Wed Jun  8 17:22:36 2022 PDT
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled
Read Cache is:        Enabled
Writeback Cache is:   Enabled

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

Current Drive Temperature:     37 C
Drive Trip Temperature:        85 C

Manufactured in week 06 of year 2014
Specified cycle count over device lifetime:  50000
Accumulated start-stop cycles:  47
Specified load-unload count over device lifetime:  600000
Accumulated load-unload cycles:  1871
Elements in grown defect list: 5

Vendor (Seagate Cache) information
  Blocks sent to initiator = 498103379558400

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:      44471        1         0     44472      36583      12783.706           0
write:         0        0         0         0      11015      19676.167           0
verify:        0        0         0         0       6221          0.000           0

Non-medium error count:        1

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -   46820                 - [-   -    -]
# 2  Background short  Completed                   -   42138                 - [-   -    -]
# 3  Background short  Completed                   -   42111                 - [-   -    -]
# 4  Background short  Completed                   -   42103                 - [-   -    -]
# 5  Background short  Completed                   -   42099                 - [-   -    -]
# 6  Background short  Completed                   -   41365                 - [-   -    -]
# 7  Background short  Completed                   -   41341                 - [-   -    -]
# 8  Background short  Completed                   -   41317                 - [-   -    -]
# 9  Background short  Completed                   -   41293                 - [-   -    -]
#10  Background short  Completed                   -   41269                 - [-   -    -]
#11  Background short  Completed                   -   41245                 - [-   -    -]
#12  Background short  Completed                   -   41221                 - [-   -    -]
#13  Background short  Completed                   -   41197                 - [-   -    -]
#14  Background short  Completed                   -   41172                 - [-   -    -]
#15  Background short  Completed                   -   41149                 - [-   -    -]
#16  Background short  Completed                   -   41125                 - [-   -    -]
#17  Background short  Completed                   -   41101                 - [-   -    -]
#18  Background short  Completed                   -   41077                 - [-   -    -]
#19  Background short  Completed                   -   41053                 - [-   -    -]
#20  Background short  Completed                   -   41029                 - [-   -    -]

Long (extended) Self-test duration: 22650 seconds [6.3 hours]

Background scan results log
  Status: waiting until BMS interval timer expires
    Accumulated power on time, hours:minutes 46915:04 [2814904 minutes]
    Number of background scans performed: 294,  scan progress: 0.00%
    Number of background medium scans performed: 294

   #  when        lba(hex)    [sk,asc,ascq]    reassign_status
   1 42149:02  00000000becb3840  [3,11,0]   Recovered via rewrite in-place


Protocol Specific port log page for SAS SSP
relative target port id = 1
  generation code = 1
  number of phys = 1
  phy identifier = 0
    attached device type: no device attached
    attached reason: unknown
    reason: power on
    negotiated logical link rate: phy enabled; unknown
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=0
    SAS address = 0x5000cca0284dc069
    attached SAS address = 0x0
    attached phy identifier = 0
    Invalid DWORD count = 0
    Running disparity error count = 0
    Loss of DWORD synchronization count = 0
    Phy reset problem count = 0
relative target port id = 2
  generation code = 1
  number of phys = 1
  phy identifier = 1
    attached device type: expander device
    attached reason: SMP phy control function
    reason: unknown
    negotiated logical link rate: phy enabled; 6 Gbps
    attached initiator port: ssp=0 stp=0 smp=0
    attached target port: ssp=0 stp=0 smp=1
    SAS address = 0x5000cca0284dc06a
    attached SAS address = 0x50030480003954bf
    attached phy identifier = 12
    Invalid DWORD count = 10
    Running disparity error count = 9
    Loss of DWORD synchronization count = 2
    Phy reset problem count = 0

On Wed, Jun 8, 2022, at 15:56, o1bigtenor wrote:
On Wed, Jun 8, 2022 at 5:22 PM Alan Braithwaite [off-list ref] wrote:
quoted
Just someone learning who asked questions in the past here
quoted
Please let me know if there's any more information I can provide.
smartmontools is very likely something that will give some more
information that (likely) will be asked for.
If not previous installed you might want to get and then look at
what it says about each drive. Often said information is asked
for when the low down and dirty work gets a happening.

HTH
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