Re: RAID0 size over 2 TB

["azurIt" <azurit@pobox.sk>]

>
> CC: linux-raid@vger.kernel.org
>On Sat, 06 Sep 2014 23:09:28 +0200 "azurIt" <azurit@pobox.sk> wrote:
>
>> 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.


# 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