Re: Crash during recover

[NeilBrown <neilb@suse.de>]

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On Tue, 29 Jul 2014 12:30:53 +0200 "Matthias Appel"
<appel.matthias@gmail.com> wrote:

> Hi all,
> 
> I have a problem with my 4 disk software raid 5.
> I had a defective disk which I identified and changed and the rebuild
> started.
> 
> But somewhere around 6pm the machine crashed and I had to reset it this
> morning.
> The problem is the raid won't start because it complains about missing
> drives.
> 
> I did mdadm -examine and saw the event counter on one disk was slightly off
> and obviously two disks fell off the raid the same time, giving me ..AA like
> you see down below.
> 
> I tried to force assemble the array and I got the message about the event
> counter being adjusted.
> I assumed the raid would start now, like multiple times before I had same
> issues with multiple failing drives/controllers
> 
> But this time not....I says that the raid is missing 2 disks but examine
> looks not this bad AFAIKS.
> I read the recovery wiki entry, but there it tells me to recreate the array
> without initial sync but I don't want to go this way because I think this
> should only be the last resort.
> 
> Can anybody look at the mdadm --examine of my disks and tell me why my raid
> is complaining about missing disks and how to recover from this issue:
> 
> If you need some more information, pleas tell me, what you need and I will
> try to get it!
> 
> Thanks in advance,
> 
> Matthias
> 

Looks like it should start.  What version of mdadm and kernel do you have?
What does:

   mdadm -V
   uname -a
   mdadm -A /dev/md0 --force -vvv /dev/sd[abe]

report?

NeilBrown


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