zfs problem vdev I/O failure

[Konstantin Kuklin]

Good morning, I have a problem with ZFS:

ZFS filesystem version 4

ZFS storage pool version 15


Yesterday my comp with Freebsd 8.2 releng shutdown with ad4 error
detached,when I copy a big file...
and after reboot in 2 wd green 1tb say me goodbye. One of them die and other
with zfs errors:

Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=187921768448 size=512 error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=187921768960 size=512 error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=311738368 size=21504 error=6
Apr 24 04:53:41 Flash root: ZFS: zpool I/O failure, zpool=zroot error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path= offset=
size= error=
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=635155456 size=3072 error=6
Apr 24 04:53:41 Flash root: ZFS: zpool I/O failure, zpool=zroot error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path= offset=
size= error=
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=635158528 size=12288 error=6
Apr 24 04:53:41 Flash root: ZFS: zpool I/O failure, zpool=zroot error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path= offset=
size= error=
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=635170816 size=512 error=6
Apr 24 04:53:41 Flash root: ZFS: zpool I/O failure, zpool=zroot error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path= offset=
size= error=
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=635171328 size=512 error=6
Apr 24 04:53:41 Flash root: ZFS: vdev I/O failure, zpool=zroot path=
offset=635171840 size=512 error=6
Apr 24 04:53:41 Flash root: ZFS: zpool I/O failure, zpool=zroot error=6

zpool status:
Flash# zpool status
  pool: zroot
 state: DEGRADED
status: One or more devices are faulted in response to IO failures.
action: Make sure the affected devices are connected, then run 'zpool
clear'.
   see: http://www.sun.com/msg/ZFS-8000-HC
 scrub: resilver in progress for 0h6m, 0.00% done, 1582566h29m to go
config:

        NAME                     STATE     READ WRITE CKSUM
        zroot                    DEGRADED    12     0     1
          mirror                 DEGRADED    36     0     4
            7159451150335751026  UNAVAIL      0     0     0  was
/dev/gpt/disk0
            gpt/disk1            ONLINE       0     0    40

errors: 12 data errors, use '-v' for a list

Zpool scrub freeze and time to resilver up in time...
How i can repair it, if zpool scrub -s zroot and detach don`t work...and
don`t work all of zfs commands =\
Thx