On Fri Jan 25, 2008 at 01:48:32AM +0100, Clemens Koller wrote: > Hi there. > > I am new to this list, however didn't find this effect nor a > solution to my problem in the archives or with google: > > short story: > ------------ > A single raid1 as /dev/md0 containing a reiserfs (with important data) > assembled during boot works just fine: > $ cat /proc/mdstat > Personalities : [linear] [raid0] [raid1] > md0 : active raid1 hdg1[1] hde1[0] > 293049600 blocks [2/2] [UU] > > The same raid1 moved to another machine as a fourth raid can be > assembled manually as /dev/md3 (to work around naming conflicts), > but it cannot be mounted anymore: > $ mdadm --assemble /dev/md3 --update=super-minor -m0 /dev/hde /dev/hdg > does not complain. /dev/md3 is created. But > It looks like you should be assembling the partitions, not the disks. Certainly the mdstat entry above shows the array being formed from the disks. Try: mdadm --assemble /dev/md3 --update=super-minor -m0 /dev/hde1 /dev/hdg1
> $ mount /dev/md3 /raidmd3 gives:
>
> Jan 24 20:24:10 rio kernel: md: md3 stopped.
> Jan 24 20:24:10 rio kernel: md: bind<hdg>
> Jan 24 20:24:10 rio kernel: md: bind<hde>
> Jan 24 20:24:10 rio kernel: raid1: raid set md3 active with 2 out of 2
> mirrors
> Jan 24 20:24:12 rio kernel: ReiserFS: md3: warning: sh-2021:
> reiserfs_fill_super: can not find reiserfs on md3
>
> Adding -t reiserfs doesn't work either.
>
Presumably the superblock for the file system cannot be found because
it's now offset due to the above issue.
HTH,
Robin
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