Date: Sat, 31 Dec 2011 13:40:59 -0800 From: Drew Tomlinson <drew@mykitchentable.net> To: freebsd-questions@freebsd.org Subject: Help Recovering FBSD 8 ZFS System Message-ID: <4EFF816B.60705@mykitchentable.net>
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I have a FBSD 8 system that won't boot. Console messages suggest I lost
my ad6 drive.
When I created the system, built root on a zfs mirror and a raidz1 pool
for data. I've managed to boot into an 8.2 Fixit shell and been able to
mount root on /mnt/root. However my raidz1 pool (data) can't be
imported. I'm *really* hoping there is some way to fix this.
From the fixit shell, here is what I get when I run 'zpool import':
# zpool import
pool: data
id: 10923029512613632741
state: UNAVAIL
status: The pool was last accessed by another system.
action: The pool cannot be imported due to damaged devices or data.
see: http://www.sun.com/msg/ZFS-8000-EY
config:
data UNAVAIL
insufficient replicas
raidz1 UNAVAIL
insufficient replicas
gptid/1be11998-6c47-11de-ae82-001b21361de7 ONLINE
ad6p4 UNAVAIL cannot
open
gptid/fc514567-6c46-11de-ae82-001b21361de7 ONLINE
gptid/0f45dd02-6c47-11de-ae82-001b21361de7 UNAVAIL cannot
open
However I'm not exactly sure what this is telling me other than
something "bad". I did capture this information when I upgraded to
version 15:
# 11/26/2010 - DLT
# http://www.freebsddiary.org/zfs-upgrade.php
#
# After upgrading to zpool v 15 and learning about upgrading zfs file
systems,
# I decided to take a snapshot of disks. It's interesting in the zpool
history
# commands, it shows different physical disks than what are currently shown.
# I don't know why.
ad6: 715404MB <Seagate ST3750330AS SD15> at ata3-master UDMA100 SATA 3Gb/s
ad10: 476940MB <Hitachi HDP725050GLA360 GM4OA52A> at ata5-master UDMA100
SATA 3Gb/s
acd0: DVDR <LITE-ON DVDRW LH-20A1L/BL05> at ata6-master UDMA100 SATA 1.5Gb/s
ad14: 476940MB <Hitachi HDP725050GLA360 GM4OA52A> at ata7-master UDMA100
SATA 3Gb/s
ad16: 476940MB <Hitachi HDP725050GLA360 GM4OA52A> at ata8-master UDMA100
SATA 3Gb/s
vm# zpool history data
History for 'data':
2009-07-12.08:56:22 zpool create data raidz1 ad8p4 ad6p4 ad12p2 ad14p2
2009-07-12.08:57:37 zfs create data/usr
2009-07-12.08:57:41 zfs create data/var
2009-07-12.08:57:59 zfs create data/home
2009-07-12.09:00:46 zfs set mountpoint=none data
2009-07-12.09:19:27 zfs set mountpoint=/usr data/usr
2009-07-12.09:19:37 zfs set mountpoint=/home data/home
2009-07-12.09:19:46 zfs set mountpoint=/var data/var
2009-07-12.10:00:29 zpool import -f data
2009-07-12.10:19:52 zpool import -f data
2009-07-12.10:35:33 zpool import -f data
2009-07-12.11:34:30 zpool import -f data
2009-07-15.13:02:10 zpool import -f data
2009-07-15.13:24:10 zpool import -f data
2009-07-17.12:48:39 zpool import -f data
2009-07-17.12:49:49 zpool upgrade data
2009-07-17.13:17:44 zpool import -f data
2009-07-17.13:48:19 zpool export data
2009-07-17.13:48:24 zpool import data
2009-07-22.16:05:37 zfs create data/archive
2009-07-22.16:07:15 zfs set mountpoint=/archive data/archive
2009-07-24.23:18:18 zfs create -V 9G data/test
2009-07-24.23:35:54 zfs destroy data/test
2010-06-05.16:39:26 zpool upgrade data
2010-07-05.06:20:09 zpool import -f data
2010-07-05.06:27:09 zfs set mountpoint=/mnt data
2010-11-28.07:39:01 zpool upgrade -a
From dmesg output, these are the drives as seen after booting to Fixit:
ad6: 715404MB <Seagate ST3750330AS SD15> at ata3-master UDMA100 SATA 3Gb/s
ad10: 476940MB <Hitachi HDP725050GLA360 GM4OA52A> at ata5-master UDMA100
SATA 3Gb/s
ad14: 476940MB <Hitachi HDP725050GLA360 GM4OA52A> at ata7-master UDMA100
SATA 3Gb/s
Thus it appears I am missing ad16 that I used to have. My data zpool
was the bulk of my system with over 600 gig of files and things I'd like
to have back. I thought that by creating a raidz1 I could avoid having
to back up the huge drive and avoid this grief. However it appears I
have lost 2 disks at the same time. :(
Any thoughts before I just give up on recovering my data pool?
And regarding my root pool, my system can't mount root and start. What
do I need to do to boot from my degraded root pool. Here's the current
status:
# zpool status
pool: root
state: DEGRADED
status: One or more devices could not be opened. Sufficient replicas
exist for
the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
see: http://www.sun.com/msg/ZFS-8000-2Q
scrub: none requested
config:
NAME STATE READ
WRITE CKSUM
root DEGRADED
0 0 0
mirror DEGRADED
0 0 0
gptid/5b623854-6c46-11de-ae82-001b21361de7 ONLINE
0 0 0
12032653780322685599 UNAVAIL
0 0 0 was /dev/ad6p3
Do I just need to do a 'zpool detach root /dev/ad6p3' to remove it from
the pool and get it to boot? And then once I replace the disk a 'zpool
attach root <new partition>' to fix?
Thanks for your time.
Cheers,
Drew
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