zfs mirror: 1 disk lost, corrupted other disk. crashes zfs tools and panics system

[Daniel Kalchev]

On 09.06.11 01:32, Edward Sutton wrote:
[...]
>    pool: zroot
>   state: FAULTED
> status: An intent log record could not be read.
>          Waiting for adminstrator intervention to fix the faulted pool.
> action: Either restore the affected device(s) and run 'zpool online',
>          or ignore the intent log records by running 'zpool clear'.
>     see: http://www.sun.com/msg/ZFS-8000-K4
>   scrub: none requested
> config:
>
>          NAME           STATE     READ WRITE CKSUM
>          zroot          FAULTED      0     0     0  bad intent log
>            mirror       DEGRADED     0     0     0
>              gpt/disk0  ONLINE       0     0     0
>              gpt/disk1  UNAVAIL      0     0     0  cannot open
>
> Going by my memory here: It fails to boot with "ROOT MOUNT ERROR". I had luck with `zpool clear, removing disk1, and mounting all pool partitions. Data could be copied off but some filesystems were missing and attempts to list all snapshots segfaults. Every export/import requires a zpool clear. Attempting a scrub lead to a panic on every import on the pool thereafter. Tried a -current snapshot (FreeBSD-9.0-CURRENT-201105-amd64-dvd1.iso) livecd mode with similar panic results to 8.2-release.
>
Perhaps you should try to use

zpool import -F zroot

from an ZFS v28 system, such as the FreeBSD-9.0-CURRENT you mentioned?

Daniel