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On Sun, Sep 30, 2001 at 07:29:06PM -0500, Evan Harris wrote:
>
> And yes, I'm using the real --force option. :)

Good (hush now, it's a secret ;)

>
> I have a 6 disk RAID5 scsi array that had one disk go offline through a
> dying power supply, taking the array into degraded mode, and then another
> went offline a couple of hours later from what I think was a loose cable.
>
> The first drive to go offline was /dev/sde1.
> The second to go offline was /dev/sdd1.
>
> Both drives are actually fine after fixing the connection problems and a
> reboot, but since the superblocks are out of sync, it won't init.

Ok.

...
[huge snip]
...
>
> I set the first disk that went offline out with a failed-disk directive, and
> tried to recover with a:
>
> mkraid --force /dev/md0

Good !

(to anyone reading this without having read the docs: don't pull this trick
unless you absolutely positively understand the consequences of screwing up
here)

>
> I'm _positive_ that the /etc/raidtab is correct, but it fails to force the
> update with:
>
> DESTROYING the contents of /dev/md0 in 5 seconds, Ctrl-C if unsure!
> handling MD device /dev/md0
> analyzing super-block
> raid_disk conflict on /dev/sde1 and /dev/sdi1 (1)
> mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
...

Read on


[snip]
> For info, here is my raidtab:
>
> raiddev /dev/md0
> raid-level 5
> nr-raid-disks 6
> nr-spare-disks 0
> chunk-size 256
> persistent-superblock 1
> device /dev/sdd1
> raid-disk 0
> device /dev/sde1
> raid-disk 1
> device /dev/sdf1
> raid-disk 2
> device /dev/sdg1
> raid-disk 3
> device /dev/sdh1
> raid-disk 4
> device /dev/sdi1
> raid-disk 5
> failed-disk 1


Wrong ! device /dev/sdi1 is railed-disk 5 not failed-disk 1,
that's why mkraid is confused.

What you want is:
device /dev/sdd1
raid-disk 0
device /dev/sde1
raid-disk 1
device /dev/sdf1
raid-disk 2
device /dev/sdg1
raid-disk 3
device /dev/sdh1
raid-disk 4
device /dev/sdi1
failed-disk 5


Good luck,

--
................................................................
: jakob@unthought.net : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob Østergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
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