ZFS and FAULTED devices (corrupted data), can't make the pool ONLINE again

[Sverre Svenningsen]

On Dec 26, 2007, at 22:38 , Barry Pederson wrote:

> Pawel Jakub Dawidek wrote:
>> On Thu, Nov 22, 2007 at 10:08:05AM +0100, Attila Nagy wrote:
>>> Hello,
>>>
>>> FreeBSD RELENG_7, x86, a terrible disk array, called Promise  
>>> RM-8000 with 8 disks on an ahc.
>>> The pool is a RAIDZ2.
>>> Tomorrow the array went crazy (its firmware is a total crap), so I  
>>> had to reboot both the machine and the disk array.
>>>
>> You should use:
>> 	# zpool replace people da3 da3
>> but to do it, you need this patch, which was not yet MFCed:
>> 	http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/contrib/opensolaris/uts/common/fs/zfs/vdev.c.diff?r1=1.3;r2=1.4
>
> I had a drive in a raidz2 pool fail, and wasn't able to replace it  
> until rebuilding the kernel (7.0beta3) with the above patch.  I'm  
> just mentioning this as a worksforme kind of thing.
>
> I'm rebuilding today with RELENG_7_0 and saw that the patch still  
> applied cleanly, so I'm assuming it's still necessary.  I hope it or  
> something similar gets merged in.  Or at least maybe the ZFS wiki  
> could have a list of recommended patches?
>
> 	Barry
>

Doesn't it work even when doing a "zfs offline people da3" first? I  
installed a 7.0-beta in a Parallels VM just to torture test the raidz  
recreation (since my real hardware is running linux+evms right now)  
and i got the error that the device was in use, until i issued the  
offline command FIRST and then told it to replace the offlined disk  
with the same disk.

This should probably be emphasized in the zfs crash course  
documentation :)

-Sverre