[Bug 27037] Re: mdadm cannot assemble array as cannot open drive with O_EXCL

[Jeffrey Baker]

@Jeremy Foshee I ran my apport-collect on a Karmic server above.  I had
the same workaround as one of the above commenters.  I had a useless,
incomplete md_d0 listed in mdstat which had claimed three of the four
devices in my RAID.  I stopped md_d0 and assembled the RAID again with
success.


$ cat /proc/mdstat 
Personalities : [raid0] 
md_d0 : inactive sde[3](S) sdc[1](S) sdd[2](S)
      1321098048 blocks
      
unused devices: <none>
# mdadm --assemble /dev/md0 /dev/sdb /dev/sdc /dev/sdd /dev/sde
mdadm: /dev/md0 has been started with 4 drives.
# cat /proc/mdstat 
Personalities : [raid0] 
md0 : active raid0 sdb[0] sde[3] sdd[2] sdc[1]
      1761460224 blocks 1024k chunks
      
unused devices: <none>


** Tags added: karmic

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mdadm cannot assemble array as cannot open drive with O_EXCL
https://bugs.launchpad.net/bugs/27037
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