Date: Mon, 25 May 2009 18:35:59 +0200 From: Thomas Backman <serenity@exscape.org> To: Freddie Cash <fjwcash@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: ZFS panic under extreme circumstances (2/3 disks corrupted) Message-ID: <45674300-D57D-4CD4-BF69-90744F9C90A0@exscape.org> In-Reply-To: <b269bc570905250919t5bf37b5cv6037f22eaf925154@mail.gmail.com> References: <4E6E325D-BB18-4478-BCFD-633D6F4CFD88@exscape.org> <D98FEABB-8B8A-48E6-B021-B05816B4C699@exscape.org> <b269bc570905250839r54a0f58fo5474e9e219a222ca@mail.gmail.com> <D817D098-9C36-4B72-9DCB-027CE8A7C564@exscape.org> <b269bc570905250919t5bf37b5cv6037f22eaf925154@mail.gmail.com>
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On May 25, 2009, at 06:19 PM, Freddie Cash wrote:
> On Mon, May 25, 2009 at 9:12 AM, Thomas Backman
> <serenity@exscape.org> wrote:
>> On May 25, 2009, at 05:39 PM, Freddie Cash wrote:
>> Was this on FreeBSD?
>
> 64-bit FreeBSD 7.1 using ZFS v6. SATA drives connected to 3Ware RAID
> controllers, but configured as "Single Drive" arrays not using
> hardware RAID in any way.
>
>> I have another unfortunate thing to note regarding this: after a
>> reboot,
>> it's even impossible to tell *which disk* has gone bad, even if the
>> pool is
>> "uncleared" but otherwise "healed". It simply says that a device
>> has failed,
>> with no clue as to which one, since they're all "ONLINE"!
>
> Even when using -v? zpool status -v
Yup, unfortunately.
[root@clone ~]# zpool status -v test
pool: test
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: http://www.sun.com/msg/ZFS-8000-8A
scrub: scrub completed after 0h0m with 372 errors on Mon May 25
12:57:46 2009
config:
NAME STATE READ WRITE CKSUM
test ONLINE 0 0 373
raidz1 ONLINE 0 0 747
da1 ONLINE 0 0 0 9K repaired
da2 ONLINE 0 0 171 119K repaired
da3 ONLINE 0 0 0 9K repaired
raidz1 ONLINE 0 0 2
ad0 ONLINE 0 0 0
ad1 ONLINE 0 0 315
ad3 ONLINE 0 0 318
errors: Permanent errors have been detected in the following files:
/test/testfile
[root@clone ~]# reboot
[root@clone ~]# zpool status -xv
pool: test
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: http://www.sun.com/msg/ZFS-8000-8A
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
test ONLINE 0 0 0
raidz1 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
ad0 ONLINE 0 0 0
ad1 ONLINE 0 0 0
ad3 ONLINE 0 0 0
errors: Permanent errors have been detected in the following files:
/test/testfile
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