RE: Problem rebuild raid 1 replacement disk

Neil,

Worked fine. Thanks again for your assistance.

Regards,
Tony
________________________________________
From: NeilBrown [neilb@suse.de]
Sent: Monday, 20 February 2012 9:51 PM
To: RANSOM, Tony
Cc: 'linux-raid@vger.kernel.org'
Subject: Re: Problem rebuild raid 1 replacement disk

On Mon, 20 Feb 2012 19:45:24 +1030 "RANSOM, Tony"
[off-list ref] wrote:

Neil,

quoted

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:

quoted

 mdadm --zero-superblock /dev/sdb

quoted

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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