Date: Tue, 2 Jun 2009 11:24:08 +0200 From: Ulrich =?utf-8?B?U3DDtnJsZWlu?= <uqs@spoerlein.net> To: freebsd-stable@freebsd.org Subject: Re: ZFS weird device tasting loop since MFC Message-ID: <20090602092408.GF93344@acme.spoerlein.net> In-Reply-To: <20090602091610.GE93344@acme.spoerlein.net> References: <20090602091610.GE93344@acme.spoerlein.net>
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On Tue, 02.06.2009 at 11:16:10 +0200, Ulrich Spörlein wrote:
> Hi all,
>
> so I went ahead and updated my ~7.2 file server to the new ZFS goodness,
> and before running any further tests, I already discovered something
> weird and annoying.
>
> I'm using a mirror on GELI, where one disk is usually *not* attached as
> a means of poor man's backup. (I had to go that route, as send/recv of
> snapshots frequently deadlocked the system, whereas a mirror scrubbing
> did not)
>
> root@coyote:~# zpool status
> pool: tank
> state: DEGRADED
> status: The pool is formatted using an older on-disk format. The pool can
> still be used, but some features are unavailable.
> action: Upgrade the pool using 'zpool upgrade'. Once this is done, the
> pool will no longer be accessible on older software versions.
> scrub: none requested
> config:
>
> NAME STATE READ WRITE CKSUM
> tank DEGRADED 0 0 0
> mirror DEGRADED 0 0 0
> ad4.eli ONLINE 0 0 0
> 12333765091756463941 REMOVED 0 0 0 was /dev/da0.eli
>
> errors: No known data errors
>
> When imported, there is a constant "tasting" of all devices in the system,
> which also makes the floppy drive go spinning constantly, which is really
> annoying. It did not do this with the old ZFS, are there any remedies?
>
> gstat(8) is displaying the following every other second, together with a
> spinning fd0 drive.
>
> dT: 1.010s w: 1.000s filter: ^...$
> L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name
> 0 0 0 0 0.0 0 0 0.0 0.0| fd0
> 0 8 8 1014 0.1 0 0 0.0 0.1| md0
> 0 32 32 4055 9.2 0 0 0.0 29.2| ad0
> 0 77 10 1267 7.1 63 1125 2.3 31.8| ad4
>
> There is no activity going on, especially md0 is for /tmp, yet it
> constantly tries to read stuff from everywhere. I will now insert the
> second drive and see if ZFS shuts up then ...
It does, but it also did not start resilvering the second disk:
root@coyote:~# zpool status
pool: tank
state: ONLINE
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: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
mirror ONLINE 0 0 0
ad4.eli ONLINE 0 0 0
da0.eli ONLINE 0 0 16
errors: No known data errors
Will now run the scrub and report back in 6-9h.
Cheers,
Ulrich Spörlein
--
http://www.dubistterrorist.de/
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