Robert Milkowski wrote:
Hello Mark,
Sunday, August 13, 2006, 8:00:31 PM, you wrote:

MM> Robert Milkowski wrote:

Hello zfs-discuss,


bash-3.00# zpool status nfs-s5-s6
 pool: nfs-s5-s6
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: resilver in progress, 0.05% done, 1735h27m to go
config:

       NAME                                     STATE     READ WRITE CKSUM
       nfs-s5-s6                                ONLINE       0     0     1
         c4t600C0FF00000000009258F4855B59001d0  ONLINE       0     0     1

errors: No known data errors
bash-3.00# zpool scrub -s nfs-s5-s6
cannot scrub nfs-s5-s6: currently resilvering
bash-3.00# zpool scrub nfs-s5-s6
cannot scrub nfs-s5-s6: currently resilvering
bash-3.00# zpool scrub -s nfs-s5-s6
cannot scrub nfs-s5-s6: currently resilvering
bash-3.00#

bash-3.00# uname -a
SunOS XXXXXXXX 5.11 snv_43 sun4u sparc SUNW,Sun-Fire-V240
bash-3.00#


1. I haven't started scrub

MM> Well, a resilver actually.  This can be kicked off automatically.
MM> Did you just import this pool?


2. I can't stop it

MM> By design.  See the man page:

MM>           Because  scrubbing  and  resilvering  are  I/O-intensive
MM>           operations, ZFS only allows one at a time. If a scrub is
MM>           already in progress,  the  "zpool  scrub"  command  ter-
MM>           minates  it  and starts a new scrub. If a resilver is in
MM>           progress, ZFS does not allow a scrub to be started until
MM>           the resilver completes.

MM> -Mark

Ooops, sorry - I didn't notice it was resilvering actually and not
scrubbing.

Pool was'nt just imported however server was cleanly rebooted.

And the pool is made of only one device - why resilvering then?

Yea, that does seem a little odd.  Perhaps this is a "resilvering" of
the ditto blocks triggered by the checksum error flagged above.  I don't
know off the top of my head... I will have to chat with the SPA guys.

-Mark
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