Date: Tue, 9 Feb 2010 15:56:25 +0100 From: Gerrit =?ISO-8859-1?Q?K=FChn?= <gerrit@pmp.uni-hannover.de> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: zpool vdev vs. glabel Message-ID: <20100209155625.a255a34d.gerrit@pmp.uni-hannover.de> In-Reply-To: <20100209142658.GA38072@icarus.home.lan> References: <20100209150606.ddba52dc.gerrit@pmp.uni-hannover.de> <20100209142658.GA38072@icarus.home.lan>
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On Tue, 9 Feb 2010 06:26:58 -0800 Jeremy Chadwick
<freebsd@jdc.parodius.com> wrote about Re: zpool vdev vs. glabel:
JC> > I'm running out of ideas here...
JC> Would "zpool export" and "zpool import" be necessary in this case?
I tried that several times, does not change anything.
JC> Also, I'm a little confused as to the use of glabel in this case. In
JC> what condition do your disk indices (e.g. X of daX) change? Are you
JC> yanking multiple disks out of a system at the same time and then
JC> shoving them back into different drive bays?
I just did not want to do hard-wiring da-devices in the kernel. I have two
lsi controllers, and they do not even come up in the same order every time
I boot (mpt0/mpt1), let alone the disks picking up the same daX every
time. I thought labeling the disks would be a good idea to prevent all
these kinds of problems.
JC> Are you switching
JC> between storage subsystem drivers (ahci(4) vs. ataahci(4), for
JC> example) regularly?
No (not yet al least :-).
JC> I've yet to be convinced glabel is worth bothering with, unless the
JC> system adheres to one of the above situations (which are worthy of
JC> strangulation anyway ;-) ).
I would really like to know how this happened at all... meanwhile I used a
spare disk under a different name to replace everything round-robin back
to normal.
However, I just recognized one more thing:
pigpen# zpool status tank
pool: tank
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Feb 9 15:50:01
2010 config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz2 ONLINE 0 0 0
label/tank1 ONLINE 0 0 0 11K resilvered
label/tank2 ONLINE 0 0 0 10K resilvered
label/tank3 ONLINE 0 0 0 11K resilvered
label/tank4 ONLINE 0 0 0 10.5K resilvered
label/tank5 ONLINE 0 0 0 11K resilvered
label/tank6 ONLINE 0 0 0 15K resilvered
errors: No known data errors
pigpen# zpool offline tank label/tank5
pigpen# zpool status tank
pool: tank
state: DEGRADED
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are
unaffected. action: Determine if the device needs to be replaced, and
clear the errors using 'zpool clear' or replace the device with 'zpool
replace'. see: http://www.sun.com/msg/ZFS-8000-9P
scrub: resilver completed after 0h0m with 0 errors on Tue Feb 9 15:50:01
2010 config:
NAME STATE READ WRITE CKSUM
tank DEGRADED 0 0 0
raidz2 DEGRADED 0 0 0
label/tank1 ONLINE 0 0 0 11K resilvered
label/tank2 ONLINE 0 0 0 10K resilvered
label/tank3 ONLINE 0 0 0 11K resilvered
label/tank4 ONLINE 0 0 0 10.5K resilvered
label/tank5 ONLINE 0 0 0 11K resilvered
label/tank6 OFFLINE 0 39 0 15K resilvered
errors: No known data errors
pigpen# zpool offline tank label/tank5
cannot offline label/tank5: no valid replicas
Why can't I offline a second disk? This is a raidz2 volume, after all?!
cu
Gerrit
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