Allo all,
I've run into a spot of bother (understatement of the year) while upgrading Ubuntu to 10.4. More specifically, after upgrading, the device names of my drives seem to have shuffled around a bit, and raid5 (softraid) broke. I'm unable to rebuild the array, as it seems to value the old device names more highly than the uuid's, and errors out.
Pastebin of the current drive situation is at http://www.pastebin.com/2AT9fQYF . The drives used to be sda, sdb and sdc, but somehow the dvd drive took over sdb post-upgrade. You can see my attempts to sort the situation here, and the results: http://www.pastebin.com/t8wPxZHu .
I can get to busybox on the PC, and am using a liveCD to try to repair it. I'm wondering whether shuffling the cables around to realign the drive letters is a sane idea ... or whether that'll make the problem worse.
Any insight much appreciated.
You've been through all of the steps I'd have tried, I'd physically move the drive cables around to see if you can get them in the right order.
Matt
-----Original Message----- From: main-bounces@lists.alug.org.uk [mailto:main-bounces@lists.alug.org.uk] On Behalf Of Adam Reid Sent: 03 May 2010 18:20 To: main@lists.alug.org.uk Subject: [ALUG] Any raid experts among us?
Allo all,
I've run into a spot of bother (understatement of the year) while upgrading Ubuntu to 10.4. More specifically, after upgrading, the device names of my drives seem to have shuffled around a bit, and raid5 (softraid) broke. I'm unable to rebuild the array, as it seems to value the old device names more highly than the uuid's, and errors out.
Pastebin of the current drive situation is at http://www.pastebin.com/2AT9fQYF . The drives used to be sda, sdb and sdc, but somehow the dvd drive took over sdb post-upgrade. You can see my attempts to sort the situation here, and the results: http://www.pastebin.com/t8wPxZHu .
I can get to busybox on the PC, and am using a liveCD to try to repair it. I'm wondering whether shuffling the cables around to realign the drive letters is a sane idea ... or whether that'll make the problem worse.
Any insight much appreciated.
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On Mon, 03 May 2010 18:19:38 +0100 Adam Reid thesilverhornet@gmail.com wrote:
Allo all,
I've run into a spot of bother (understatement of the year) while upgrading Ubuntu to 10.4. More specifically, after upgrading, the device names of my drives seem to have shuffled around a bit, and raid5 (softraid) broke. I'm unable to rebuild the array, as it seems to value the old device names more highly than the uuid's, and errors out.
Pastebin of the current drive situation is at http://www.pastebin.com/2AT9fQYF . The drives used to be sda, sdb and sdc, but somehow the dvd drive took over sdb post-upgrade. You can see my attempts to sort the situation here, and the results: http://www.pastebin.com/t8wPxZHu .
What is in /etc/mdadm/mdadm.conf? Does this limit the way the drives are scanned or name particular devices for a particular array?
HTH, Steve.
On 04 May 23:19, Steve Fosdick wrote:
On Mon, 03 May 2010 18:19:38 +0100 Adam Reid thesilverhornet@gmail.com wrote:
Allo all,
I've run into a spot of bother (understatement of the year) while upgrading Ubuntu to 10.4. More specifically, after upgrading, the device names of my drives seem to have shuffled around a bit, and raid5 (softraid) broke. I'm unable to rebuild the array, as it seems to value the old device names more highly than the uuid's, and errors out.
Pastebin of the current drive situation is at http://www.pastebin.com/2AT9fQYF . The drives used to be sda, sdb and sdc, but somehow the dvd drive took over sdb post-upgrade. You can see my attempts to sort the situation here, and the results: http://www.pastebin.com/t8wPxZHu .
What is in /etc/mdadm/mdadm.conf? Does this limit the way the drives are scanned or name particular devices for a particular array?
I believe he has a working array again now, apparently a hard power failure was the initial cause, and one of the 3 disks wasn't as in sync as the others, rebuilding the raid5 with the 2 that did agree about live, and removing and readding that third device has put the array back as it should be...
But, it does appear that he suffers from interesting IO issues on that box anyways, and so the sync tends to take most of the machine offline... this is a seperate issue, though ;)
Cheers,
-
Adam Reid -
Brett Parker -
Matthew Green -
Steve Fosdick