Errors on a file on a zpool: How to remove?

[Rich]

On Sat, Jan 23, 2010 at 4:21 PM, Wes Morgan <morganw at chemikals.org> wrote:
> On Sat, 23 Jan 2010, Rich wrote:
>
>> I already diagnosed the bad hardware - one of the two sticks of RAM
>> had gone bad, and fails memtest in the other machine.
>>
>>   pool: rigatoni
>>  state: ONLINE
>> status: One or more devices has experienced an error resulting in data
>>       corruption.  Applications may be affected.
>> action: Restore the file in question if possible.  Otherwise restore the
>>       entire pool from backup.
>>    see: http://www.sun.com/msg/ZFS-8000-8A
>>  scrub: scrub completed after 15h28m with 1 errors on Thu Jan 21 18:09:25 2010
>> config:
>>
>>       NAME        STATE     READ WRITE CKSUM
>>       rigatoni    ONLINE       0     0     1
>>         da4       ONLINE       0     0     2
>>         da5       ONLINE       0     0     2
>>         da7       ONLINE       0     0     0
>>         da6       ONLINE       0     0     0
>>         da2       ONLINE       0     0     2
>>
>> errors: Permanent errors have been detected in the following files:
>>
>>         rigatoni/mirrors:<0x0>
>
> Can you post your entire pool filesystem structure? That message above
> looks like an unreferenced block or corrupted metadata rather than an
> actual file. Also, if it's part of a snapshot, you simply have to destroy
> the snapshot.
>
> I had a pool become corrupted due to bad memory, and all of the files were
> still able to be manipulated. The only time EIO popped up was on the
> specific block that had a checksum error.

# zfs list -r -t all rigatoni
NAME                  USED  AVAIL  REFER  MOUNTPOINT
rigatoni             5.73T   984G    19K  /rigatoni
rigatoni/logs_bitch   269M   984G   269M  /rigatoni/logs_bitch
rigatoni/mirrors     5.73T   984G  5.73T  /mirrors

No snapshots here. :/

EIO only pops up on the files I mentioned above - everything else in
those directories, including renaming that directory, is fine.

- Rich