On 18.01.10 20:12, Stéphane wrote:
Hello,
I am a French user of OpenSolaris for 2 years now.
This morning I had an electricity issue and my server stop.
But after I restart him, I had a very very big problem : my zpool disappeared !
No it is not.
I opened a terminal and write :
# zpool status
pool: raid
state: FAULTED
status: An intent log record could not be read.
Waiting for adminstrator intervention to fix the faulted pool.
action: Either restore the affected device(s) and run 'zpool online',
or ignore the intent log records by running 'zpool clear'.
see: http://www.sun.com/msg/ZFS-8000-K4
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
raid FAULTED 0 0 0 bad intent log
raidz1 ONLINE 0 0 0
c7t0d0 ONLINE 0 0 0
c7t1d0 ONLINE 0 0 0
c7t2d0 ONLINE 0 0 0
c7t3d0 ONLINE 0 0 0
c7t4d0 ONLINE 0 0 0
c7t5d0 ONLINE 0 0 0
c7t6d0 ONLINE 0 0 0
c7t7d0 ONLINE 0 0 0
logs FAULTED 0 0 0 bad intent log
c8d1 UNAVAIL 0 0 0 corrupted data
Output above tells that automatic open of your pool during boot failed and the
reason was some issue with some ZIL record on your log disk. So pool is imported
but cannot be used so it is in FAULTED state.
ZIL is important to guarantee data integrity from application standpoint. Even
though ZIL record cannot be read, your ZFS pool is still consistent on disk.
# zpool import -f raid
cannot import 'raid': no such pool available
This fails because your pool 'raid' is present in ZFS namespace or, in other
words, is already imported, so you cannot import it second time.
# zpool import
--> And nothing, my zpool completely disappeared when I type "zpool import" !!!
Again, this is because your pool is imported, and there are no other pools
available to import.
So you need to make sure first that your log device is at least readable. I
suggest trying
zdb -l /dev/rdsk/c8d1s0
If it shows 4 labels, then disk itself is probably readable and fine, so it is
the problem with the ZIL record. If it is the case, then you have a choice of
dropping last few seconds of synchronous writes that are recorded in the ZIL to
recover your pool.
You can do it with 'zpool clear raid'. Remember, that this will result in some
files being inconsistent from the application standpoint, so you'll have to
check your applications and fix any it may have.
if there are issues with your log disk c8d1 - e.g. it is unreadable at all, you
may try to deal with it first before using 'zpool clear'
hth,
victor
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