Re: Raid 5 Recovery

["NeilBrown" <neilb@suse.de>]

On Mon, December 29, 2008 5:13 am, Erik Boettcher wrote:
> ---------- Forwarded message ----------
> From: Erik Boettcher <tehfoo@gmail.com>
> Date: Sun, Dec 28, 2008 at 1:04 PM
> Subject: Re: Raid 5 Recovery
> To: Dylan Distasio <interzone@gmail.com>
>
>
> On Sun, Dec 28, 2008 at 1:02 PM, Erik Boettcher <tehfoo@gmail.com> wrote:
>> On Sun, Dec 28, 2008 at 10:53 AM, Dylan Distasio <interzone@gmail.com>
>> wrote:
>>> Have you tried assembling the array degraded to see if you can force
>>> it without sdd3?  I don't know if this is the best solution, but if
>>> that works, you can then readd sdd3 and have the array rebuild.
>>
>> I tried forcing the assembly without sdd3, and it complains about sde3!
>>
>> I find it interesting that before the first command sdc3 failed but
>> now it's not the fault point....
>>
>
> I guess I should specify how it complains: the exact same error
> message but sde3 instead.

Yes, specifics are good.  I'm afraid I need a few more though.
  mdadm -Esvvv
and
  dmesg | tail -20

after the failed --assemble attempt would be a good start.

NeilBrown


>
> mack ~ # mdadm -A --force --no-degraded /dev/md0 /dev/sd{a,b,c,e}3
> mdadm: superblock on /dev/sde3 doesn't match others - assembly aborted
>
> eek, and I tried with the first 3 hdds and got this:
> mack ~ # mdadm -A --force --no-degraded /dev/md0 /dev/sd{a,b,c}3
> mdadm: clearing FAULTY flag for device 2 in /dev/md0 for /dev/sdc3
> mdadm: clearing FAULTY flag for device 1 in /dev/md0 for /dev/sdb3
> mdadm: clearing FAULTY flag for device 0 in /dev/md0 for /dev/sda3
> mdadm: failed to add /dev/sdb3 to /dev/md0: Invalid argument
> mdadm: failed to add /dev/sda3 to /dev/md0: Invalid argument
> mdadm: failed to add /dev/sdc3 to /dev/md0: Invalid argument
> mdadm: /dev/md0 assembled from 0 drives (out of 5), but not started.
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