Re: Brocken Raid & LUKS

[Phil Turmel <philip@turmel.org>]

On 02/22/2013 05:42 PM, Stone wrote:
> Am 22.02.2013 23:35, schrieb Phil Turmel:
>> Please recreate the array with this combination, then show:
>>
>> mdadm -D /dev/md2
>> mdadm -E /dev/sd[bce]1
>> cat /proc/partitions
>> for x in /dev/sd[bce] ; do fdisk -l $x ; done

> i dont know what chunk do you what but i think you mean 512k

Yes.

> mdadm --create /dev/md2 --assume-clean --chunk=512 --verbose --level=5
> --raid-devices=4 /dev/sdb1 /dev/sdc1 missing /dev/sde1

> mdadm -E /dev/sd[bce]1
> /dev/sdb1:

>  Avail Dev Size : 3907027037 (1863.02 GiB 2000.40 GB)
>      Array Size : 11721071616 (5589.04 GiB 6001.19 GB)
>   Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB)

> /dev/sdc1:
>  Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB)
>      Array Size : 11721071616 (5589.04 GiB 6001.19 GB)
>   Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB)

See the difference?

> /dev/sde1:
>  Avail Dev Size : 3907027037 (1863.02 GiB 2000.40 GB)
>      Array Size : 11721071616 (5589.04 GiB 6001.19 GB)
>   Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB)

> /proc/partitions
> major minor  #blocks  name
> 
>    8        0  244198584 sda
>    8        1     248832 sda1
>    8        2          1 sda2
>    8        5  243947520 sda5
>  252        0  235589632 dm-0
>  252        1    8351744 dm-1
>    8       16 1953514584 sdb
>    8       17 1953514542 sdb1
>    8       32 1953514584 sdc
>    8       33 1953513472 sdc1

And here?

>    8       48 1953514584 sdd
>    8       49 1953514542 sdd1
>    8       64 1953514584 sde
>    8       65 1953514542 sde1
>    9        2 5860535808 md2

> for x in /dev/sd[bce] ; do fdisk -l $x ; done
> 
> WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util
> fdisk doesn't support GPT. Use GNU Parted.

Oops.  But you get the point, I hope.  /dev/sdc has a different
partition table from /dev/sdb and /dev/sde.  That short partition is
causing mdadm to make the array too small for the filesystem in it.

You need to fix the partitions on /dev/sdc to exactly match /dev/sdb and
/dev/sde.  Can you explain how it might have become different?

And use "parted /dev/sdb print" to show the partitions instead of fdisk.

Phil