9-stable : geli + one-disk ZFS fails

[Adam Nowacki]

It appears that zfs detects mismatch between data stored on the disk and 
checksum of what should be there. With a single disk setup like you have 
here there is nothing more to do than to delete the file and restore 
from a backup if you have one. When the error occured, what caused it or 
is the error in data or checksum you'll probably never know.

On 2012-02-11 16:53, Arno J. Klaassen wrote:
>
> Hello,
>
>
> I finally decided to 'play' a bit with ZFS on a notebook, some years
> old, but I installed a brand new disk and memtest passes OK.
>
> I installed base+ports on partition 2, using 'classical' UFS.
>
> I crypted partition 3 and created a single zpool on it containing
> 4 Z-"file-systems" :
>
>   [root at cc ~]# zfs list
>   NAME                      USED  AVAIL  REFER  MOUNTPOINT
>   zfiles                   10.7G   377G   152K  /zfiles
>   zfiles/home              10.6G   377G   119M  /zfiles/home
>   zfiles/home/arno         10.5G   377G  2.35G  /zfiles/home/arno
>   zfiles/home/arno/.priv    192K   377G   192K  /zfiles/home/arno/.priv
>   zfiles/home/arno/.scito  8.18G   377G  8.18G  /zfiles/home/arno/.scito
>
>
> I export the ZFS's via nfs and rsynced on the other machine some backup
> of my current note-book (geli + UFS, (almost) same 9-stable version, no
> problem) to the ZFS's.
>
>
> Quite fast, I see on the notebook :
>
>
>   [root at cc /usr/temp]# zpool status -v
>     pool: zfiles
>    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
>     scan: scrub repaired 0 in 0h1m with 11 errors on Sat Feb 11 14:55:34
>     2012
>   config:
>
>           NAME          STATE     READ WRITE CKSUM
>           zfiles        ONLINE       0     0    11
>             ada0s3.eli  ONLINE       0     0    23
>
>   errors: Permanent errors have been detected in the following files:
>
>           /zfiles/home/arno/.scito/contrib/XNAT.tar
>   [root at cc /usr/temp]# md5 /zfiles/home/arno/.scito/contrib/XNAT.tar
>   md5: /zfiles/home/arno/.scito/contrib/XNAT.tar: Input/output error
>   [root at cc /usr/temp]#
>
>
> As said, memtest is OK, nothing is logged to the console, UFS on the
> same disk works OK (I did some tests copying and comparing random data)
> and smartctl as well seems to trust the disk :
>
>   SMART Self-test log structure revision number 1
>   Num  Test_Description    Status                  Remaining  LifeTime(hours)
>   # 1  Extended offline    Completed without error       00%       388
>   # 2  Short offline       Completed without error       00%       387
>
>
> Am I doing something wrong and/or let me know what I could provide as
> extra info to try to solve this (dmesg.boot at the end of this mail).
>
> Thanx a lot in advance,
>
> best, Arno