On Tue, 21 Dec 2010 12:01:37 -0800 Andrew Burgess <aab@xxxxxxxxxxx> wrote:
> mdadm 3.14
> kernel 2.6.35.8
>
> I started a reshape changing chunk size and after it ran
> for a while i realized the disk i used for the
> backup file was slow so I killed the mdadm
That was a mistake.
> running in the background and tried to restart
> with the new location (i moved the file just in case)
>
> mdadm /dev/md5 --grow --chunk=8 --backup-file=/my/raid/RAID_BACKUP_FILE
As you discovered, that doesn't work. I'd like to make it possible to do
something like that, but time is not something I have a lot of.
>
> it complains:
>
> mdadm: /dev/md5 is performing resync/recovery and cannot be reshaped
>
> /proc/mdstat for md5 shows partial progress but the numbers don't change
> (except finish grows):
>
> md5 : active raid6 sdd1[2] sdf1[8] sdc1[1] sdb1[0] sdh1[4] sdl1[5]
> sdj1[3] sdg1[7] sdk1[6]
> 13674583552 blocks super 0.91 level 6, 128k chunk, algorithm 2
> [9/9] [UUUUUUUUU]
> [>....................] reshape = 0.1% (2715648/1953511936)
> finish=850711.5min speed=38K/sec
>
> The mdadm 3.14 is freshly compiled. I started the reshape
> with mdadm 3.13.
>
> I didn't try rebooting as the filesystem is mounted and
> the data seems ok. Didn't want to make things worse...
It shouldn't make things worse.
Do don't need to reboot, unless md5 has your root filesystem.
Just unmount, 'mdadm -S /dev/md5', and assemble:
mdadm -A /dev/md5 --backup-file=/whereever-you-copied-the-file-to \
/dev/sd[dfcbhljgk]1
should do it.
NeilBrown
>
> Thank you for any help
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