From: Rob McMahon (Rob.McMahon@warwick.ac.uk)
Date: Wed Sep 13 2006 - 05:11:17 EDT
My metaset ended up in this state after a nasty crash (fan failed, over
temperature).
> Set name = dkset, Set number = 2
>
> Host Owner
> fserver No (auto)
>
> Drive Dbase
>
> /dev/dsk/c3t500805F300171B51d1 No
>
> Trying to take ownership says
>
> > metaset -s dkset -t -f
> metaset: fserver: dkset: not owner of metadevice database
>
> Exit 1
> >
>
Time pressure meant that I had to bite the bullet, thinking at least
I've got backups if it all goes horribly wrong. Here's what I did:
Save the current partitioning in case I have to recover later
> prtvtoc /dev/dsk/c3t500805F300171B51d1 > dkset.vtoc
Check the metadevices are in /etc/lvm/md.tab. I don't know of a way to
recover this if you've not kept this up to date. I always make sure I do.
Purge the diskset:
> metaset -s dkset -P
Recreate with myself as a member, and the disk as a device:
> metaset -s dkset -a -h fserver
> metaset -s dkset -A enable
> metaset -s dkset -a c3t500805F300171B51d1
Check the partitioning hasn't changed:
> prtvtoc /dev/dsk/c3t500805F300171B51d1 | diff dkset.vtoc
Start breathing again. Recreate metadevices:
> tail md.tab
# dkset/d1 (/export/home/01)
dkset/d1 -m dkset/d10
dkset/d10 1 1 c3t500805F300171B51d1s0
# dkset/d2 (/export/home/02)
dkset/d2 -m dkset/d20
dkset/d20 1 1 c3t500805F300171B51d1s1
> metainit -s dkset d10
> metainit -s dkset d20
> metainit -s dkset d1
> metainit -s dkset d2
> metastat -s dkset
(then metattach the sub-mirrors: I haven't actually got any yet) ... and
I'm back in action. I hate the bit on the metaset man page where it
says that if it doesn't like your partitioning it'll repartition it and
trash all your data. It talks of slice 6 or 7 starting in cylinder 0
and being "big enough". My slice 6 is:
Part Tag Flag First Sector Size Last Sector
6 usr wu 34 4.01MB 8241
So it probably starts in cylinder 0, though not sector 0, and the man
page says, for "big enough", it says "the slice is no less than 4
Mbytes, and probably closer to 6 Mbytes". Hence my nervousness. There
should at least be a flag that tells it only to add the set if the disk
looks properly formatted.
Cheers,
Rob
-- E-Mail: Rob.McMahon@warwick.ac.uk PHONE: +44 24 7652 3037 Rob McMahon, IT Services, Warwick University, Coventry, CV4 7AL, England _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagers
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