ZFS RaidZ-2 problems

[Paul Wootton]

On 10/30/12 16:10, Ronald Klop wrote:
> On Tue, 30 Oct 2012 15:37:55 +0100, Paul Wootton 
> <paul-freebsd at fletchermoorland.co.uk> wrote:
>
>> On 10/30/12 12:04, Dennis Glatting wrote:
>>> I've had this problem too. Here is what I can tell you for my case. 
>>> ... I replaced the card, the cable, and the disks themselves leaving 
>>> only one other possibility -- the power supply. The faulting array 
>>> was on a separate cable from the power supply. I replaced the power 
>>> supply, going from a 1,000W to 1,300W, and the power cables to the 
>>> disks. Not a problem since.
>>
>> While I can accept that I might have a bad power supply. or cables, 
>> my main concern is that I have only 1 drive showing as "Unavail" on a 
>> RAIDZ-2 and the pack is showing "Faulted".
>> I would have expected that pack to continue working with 2 bad 
>> drives, and would have failed if I had 3rd one fail
>>
>> Paul
>
> Isn't your problem something else than a non-working pool with one 
> broken disk. I guess it still worked before you exported it. Your 
> actual problem is 'zpool import' does not work for your pool. Maybe 
> there is more broken than one disk.
>
> Why did you export/import to fix anything in stead of replacing the 
> faulted disk?
>
> (I'm not into the code details of ZFS, so can't help you with 
> everything.)
>
> Ronald.
>
>
The pool was marked as faulted before I tried exporting/importing.ZFS 
should have marked the pool as degraded, so I wondered if I exported and 
then reimported the pool, ZFS would taste each of the disks and imported 
the pool in a degraded mode.