On Mon, 20 Feb 2012 19:45:24 +1030 "RANSOM, Tony" <tony.ransom@xxxxxxxxxxxxxx> wrote: > Neil, > > >Yes. > >Somehow both sdb and sdb3 have a superblock for the same array. Must have > >been a typo somewhere I suspect. > >You should remove the one you don't want: > > > mdadm --zero-superblock /dev/sdb > > >then it should all work nicely again. > > > Unfortunately, the above command gave the following error : > > root@server2:~# mdadm --zero-superblock /dev/sdb > mdadm: Couldn't open /dev/sdb for write - not zeroing > > Do you know how to work around? Presumably this is because sdb3 is active in the array. This keeps sdb busy. If this is the current situation then adding --force to the command should make it work. Otherwise you might need to remove sdb from the array first. NeilBrown
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