Neil, Removed both partitions and zeroed the super-block on sdb. Readded the drive. It's rebuilding. No output for the mdadm -E /dev/sbd command now. Proof will be if the array reboots without problem. Will take a while to rebuild. Will try tomorrow night. Thanks very much for your assistance. I'll let you know how it goes. Regards, Tony ________________________________________ From: NeilBrown [neilb@xxxxxxx] Sent: Monday, 20 February 2012 9:51 PM To: RANSOM, Tony Cc: 'linux-raid@xxxxxxxxxxxxxxx' Subject: Re: Problem rebuild raid 1 replacement disk 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 "Warning: The information contained in this email and any attached files is confidential to BAE Systems Australia. If you are not the intended recipient, any use, disclosure or copying of this email or any attachments is expressly prohibited. If you have received this email in error, please notify us immediately. VIRUS: Every care has been taken to ensure this email and its attachments are virus free, however, any loss or damage incurred in using this email is not the sender's responsibility. It is your responsibility to ensure virus checks are completed before installing any data sent in this email to your computer." -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
