On Mon, 08 Sep 2014 09:18:11 +0200 "azurIt" [off-list ref] wrote:

quoted

CC: linux-raid@vger.kernel.org
On Sat, 06 Sep 2014 23:09:28 +0200 "azurIt" [off-list ref] wrote:

quoted

Hi,

i'm having problems with growing my RAID0 array over 2 TB. I installed two 4 TB drives, created 4 TB partitions but array cannot be resized over 2 TB. Superblock versoin is 0.90 and kernel version is 3.2.53 - according to linux RAID wiki, it should support 4 TB component/array size:
https://raid.wiki.kernel.org/index.php/RAID_superblock_formats#The_version-0.90_Superblock_Format

Some more info:

# mdadm --detail /dev/md2
/dev/md2:
        Version : 0.90
  Creation Time : Tue Sep 28 16:54:04 2010
     Raid Level : raid1
     Array Size : 2147483520 (2048.00 GiB 2199.02 GB)
  Used Dev Size : 2147483520 (2048.00 GiB 2199.02 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 2
    Persistence : Superblock is persistent

    Update Time : Sat Sep  6 23:04:44 2014
          State : clean 
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 9a363004:ad04abfe:2e31e1c3:caf66df4
         Events : 0.77066

    Number   Major   Minor   RaidDevice State
       0       8       33        0      active sync   /dev/sdc1
       1       8       49        1      active sync   /dev/sdd1







# fdisk /dev/sdd

WARNING: GPT (GUID Partition Table) detected on '/dev/sdd'! The util fdisk doesn't support GPT. Use GNU Parted.

Why are you using "fdisk" even though "fdisk" is telling you not to use it?

What does
 cat /proc/partitions

say about the sizes of the partitions?

NeilBrown

I, of course, didn't use fdisk to create partitions - they were created using cgdisk, but it's graphical tool so i wasn't able to send output from it, so i get output from fdisk to prove, that partitions are large enough.

Yet fdisk *didn't* prove that the partitions are large enough - it said the
partitions were:

/dev/sdd1               1  4294967295  2147483647+  ee  GPT
                                       ^^^^^^^^^^^

2 Gig.

And /proc/partitions tells me:

# cat /proc/partitions
major minor  #blocks  name

   9        2 2147483520 md2
   8       32 3907018584 sdc
   8       33 2147483647 sdc1
   8       48 3907018584 sdd
   8       49 2147483647 sdd1

that the partitions are 2Gig.  You need to sort the partition size out.  I
cannot help you.  I have no experience with GPT.  Maybe a reboot?

NeilBrown