ZFS RaidZ2 with 24 drives?

[James R. Van Artsdalen]

Results like this indicate a problem with the disk system.  There is a
problem with the driver, card, cables or disks, etc.  The Areca probably
has problems with JBOD mode (I was unable to get a different Areca RAID
card to work reliably in JBOD mode this spring so I'm not surprised).

If these are SATA drives try a card using the Silicon Image 3124
controller and the SIIS driver: for SAS try the LSI 3801e or 3081E-R cards.

> $ ssh back02 zpool status
>   pool: back02
>  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: none requested
> config:
>
>     NAME        STATE     READ WRITE CKSUM
>     back02      ONLINE       0     0  934K
>       raidz1    ONLINE       0     0     0
>         da0     ONLINE       0     0     0
>         da1     ONLINE       0     0     0
>         da2     ONLINE       0     0     0
>         da3     ONLINE       0     0     0
>         da4     ONLINE       0     0     0
>         da5     ONLINE       0     0     0
>         da6     ONLINE       0     0     0
>       raidz1    ONLINE       0     0 1.83M
>         da8     ONLINE       0     0     0
>         da9     ONLINE       0     0     0
>         da10    ONLINE       0     0     0
>         da11    ONLINE       0     0     0
>         da12    ONLINE       0     0     0
>         da13    ONLINE       0     0     0
>         da14    ONLINE       0     0     0
>       raidz1    ONLINE       0     0 1.83M
>         da16    ONLINE       0     0     0
>         spare   ONLINE       0     0     0
>           da17  ONLINE       0     0     0
>           da7   ONLINE       0     0     0
>         da18    ONLINE       0     0     0
>         da19    ONLINE       0     0     0
>         da20    ONLINE       0     0     0
>         da21    ONLINE       0     0     0
>         da22    ONLINE       0     0     0
>     spares
>       da15      AVAIL
>       da23      AVAIL
>       da7       INUSE     currently in use
>
> errors: 241 data errors, use '-v' for a list