On Dec 14, 2014 1:10 PM, "Durval Menezes" <durval....@gmail.com> wrote:
> Just tried to rollback a snapshot here (EL6 clone with kernel 2.6.32-504.1.3.el6.x86_64 and ZFS 0.6.3-1.1 installed from the ZFS repo), and it never ends:
>> zfs rollback pool2014070601/main@20141119Z072639XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> Checked with "zpool iostat pool2014070601": exactly zero I/O for more than half an hour.
> The process shows as "D" in ps, which AFAIK means it's blocked in uninterruptable wait for I/O.
> Any recommendations besides stopping whatever's possible to stop and then hard-resetting the machine?
No alternatives offered, so I proceeded as above and then imported the pool and tried to rollback again, with the same result: zfs rollback process in a neverending block at 'D' state.
Hard reset again, but this time I moved the disk to another machine where I have zfs-fuse 0.7.0 installed: zfs-fuse imported the pool and processed the rollback with no issues, in much less time than I'm taking to type this.
Seems zfs-fuse is still a very viable option for recovery, as long as one keeps his/her pools in a version zfs-fuse can handle (v26, I think).
Crossposting to the zfs-fuse list on this, in case folks there are interested.Cheers,
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I don't suppose you happen to have gathered any data that might provide insight exactly where the bug might be?