Re: mdadm 3.1.1: level change won't start

[Michael Evans <mjevans1983@gmail.com>]

On Sun, Dec 20, 2009 at 7:41 PM, Kristleifur Daðason
<kristleifur@gmail.com> wrote:
> Hi all,
>
> I wish to convert my 3-drive RAID-5 array to a 6-drive RAID-6. I'm on
> Linux 2.6.32.2 and have mdadm version 3.1.1 with the 32-bit-array-size
> patch from here: http://osdir.com/ml/linux-raid/2009-11/msg00534.html
>
> I have three live drives and three spares added to the array. When I
> initialize the command, mdadm does the initial checks and aborts with
> a "cannot set device shape" without doing anything to the array.
>
> Following are some md stats and growth command output:
>
> ___
>
> $ cat /proc/mdstat
> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
> [raid4] [raid10]
> md_d1 : active raid5 sdd1[6](S) sdc1[5](S) sdb1[4](S) sdf1[1] sde1[0] sdl1[3]
>       2930078720 blocks super 1.1 level 5, 256k chunk, algorithm 2 [3/3] [UUU]
>       bitmap: 1/350 pages [4KB], 2048KB chunk
>
> $ mdadm --detail --scan
> ARRAY /dev/md/d1 metadata=1.01 spares=3 name=mamma:d1
> UUID=da547022:042a6f68:d5fe251e:5e89f263
>
> $ mdadm --grow /dev/md_d1 --level=6 --raid-devices=6
> --backup-file=/root/backup.md1_to_r6
> mdadm: metadata format 1.10 unknown, ignored.
> mdadm: metadata format 1.10 unknown, ignored.
> mdadm level of /dev/md_d1 changed to raid6
> mdadm: Need to backup 1024K of critical section..
> mdadm: Cannot set device shape for /dev/md_d1
> mdadm: aborting level change
> ___
>
>
> Three questions -
>
> 1. What does the stuff about "metadata format 1.10 unknown" mean?
> Notice the "super 1.1" vs. "metadata 1.01" vs. "metadata format 1.10"
> disrepancy between mdsat, --detail and --grow output.
>
> 2. Am I doing something wrong? :)
>
> 3. How can I get more info about what is causing the failure to
> initialize the growth?
>
> Thanks!
>
> -- Kristleifur
>
>
> (P.s., I'm cc-ing this directly to Neil Brown as the maintainer of
> mdadm. I hope that isn't rude of me.)
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I thought there were three metadata variants for 1.x: 1.0 1.1 and 1.2
 Maybe the extra 1 or 0 at the end refers to a reshape in progress?
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