Re: MDADM 3.3 broken?

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For cisco's server:

> mdadm --examine --scan
ARRAY metadata=ddf UUID=7ab254d0:fae71048:404edde9:750a8a05
ARRAY container=7ab254d0:fae71048:404edde9:750a8a05 member=0
UUID=5337ab03:86ca2abc:d42bfbc8:23626c78

> mdadm --assemble --scan --no-degraded -v >
mdadm: looking for devices for further assembly
mdadm: /dev/md/ddf0 is a container, but we are looking for components
mdadm: no RAID superblock on /dev/sdf
mdadm: no RAID superblock on /dev/md/MegaSR2
mdadm: no RAID superblock on /dev/md/MegaSR1
mdadm: no RAID superblock on /dev/md/MegaSR
mdadm: cannot open device /dev/sr0: No medium found
mdadm: /dev/sdd is busy - skipping
mdadm: /dev/sdc is busy - skipping
mdadm: /dev/sdb is busy - skipping
mdadm: /dev/sda is busy - skipping
mdadm: /dev/sde is busy - skipping
mdadm: looking for devices for further assembly
mdadm: looking in container /dev/md/ddf0
mdadm: member /md127/0 in /dev/md/ddf0 is already assembled
mdadm: Cannot assemble mbr metadata on /dev/sdf
mdadm: Cannot assemble mbr metadata on /dev/md/MegaSR2
mdadm: Cannot assemble mbr metadata on /dev/md/MegaSR1
mdadm: Cannot assemble mbr metadata on /dev/md/MegaSR
mdadm: cannot open device /dev/sr0: No medium found
mdadm: /dev/sdd has wrong uuid.
mdadm: /dev/sdc has wrong uuid.
mdadm: /dev/sdb has wrong uuid.
mdadm: /dev/sda has wrong uuid.
mdadm: /dev/sde has wrong uuid.



On Tue, Nov 19, 2013 at 12:38 PM, Martin Wilck <mwilck@xxxxxxxx> wrote:
> The question I have is why is there IMSM meta data on sdc2 at all?
> IMSM metadata sit at the end of a block device. So I figure that sdc2 is
> the last partition, and by some wird circumstance it's so large that it
> includes the last sectors of the physical disk where the metadata
> resides. That would be a bad idea, a dd if=/dev/zero of=/dev/sdc2 would
> wipe not only the partition but also the RAID meta data.
>
> Martin
>
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