On 04/ 5/10 05:28 AM, Eric Schrock wrote:
On Apr 5, 2010, at 3:38 AM, Garrett D'Amore wrote:
Am I missing something here? Under what conditions can I expect hot spares to
be recruited?
Hot spares are activated by the zfs-retire agent in response to a list.suspect
event containing one of the following faults:
fault.fs.zfs.vdev.io
fault.fs.zfs.vdev.checksum
fault.fs.zfs.device
The last of these (fault.fs.zfs.device) is what is diagnosed when a label is
corrupted. What software are you runnig? Have you confirmed that you are
getting one of these faults? What does 'fmdump -V' show? Does doing a 'zpool
replace c2t3d1 c2t3d2' by hand succeed?
I see ereport.fs.zfs.io_failure, and ereport.fs.zfs.probe_failure.
Also, ereport.io.service.lost and ereport.io.device.inval_state. There
is indeed a fault.fs.zfs.device in the list as well.
Clearly ZFS thinks the device is unavailable (which is accurate).
And "pfexec zpool replace testpool c2t3d1 c2t3d2" works fine, as shown here:
gdam...@tabasco{33}> pfexec zpool status
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c1t0d0s0 ONLINE 0 0 0
errors: No known data errors
pool: testpool
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: resilver completed after 0h0m with 0 errors on Mon Apr 5
08:39:57 2010
config:
NAME STATE READ WRITE CKSUM
testpool DEGRADED 0 0 0
raidz1-0 DEGRADED 0 0 0
c2t3d0 ONLINE 0 0 0
spare-1 DEGRADED 0 0 0
c2t3d1 UNAVAIL 9 132 0 cannot open
c2t3d2 ONLINE 0 0 0 20.8M resilvered
spares
c2t3d2 INUSE currently in use
errors: No known data errors
gdam...@tabasco{34}>
Everything seems to be correct *except* that ZFS isn't automatically
doing the replace operation with the hot spare.
It feels to me like this is possibly a ZFS bug --- perhaps ZFS is
expecting a specific set of FMA faults that only sd delivers? (Recall
this is with a different target device.)
- Garrett
- Eric
--
Eric Schrock, Fishworks http://blogs.sun.com/eschrock
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