Degraded zpool cannot detach old/bad drive

[Rumen Telbizov]

Hi Artem, everyone,

Here's the latest update on my case.
I did upgrade the system to the latest stable: 8.1-STABLE FreeBSD 8.1-STABLE
#0: Sun Oct 31 11:44:06 PDT 2010
After that I did zpool upgrade and zfs upgrade -r all the filesystems.
Currently I am running zpool 15 and zfs 4.
Everything went fine with the upgrade but unfortunately my problem still
persists. There's no difference in this aspect.
I still have mfid devices. I also tried chmod-ing as you suggested /dev/mfid
devices but zfs/zpool didn't seem to care and imported
the array regardless.

So at this point since no one else seems to have any ideas and we seem to be
stuck I am almost ready to declare defeat on this one.
Although the pool is usable I couldn't bring it back to exactly the same
state as it was before the disk replacements took place.
Disappointing indeed, although not a complete show stopper.

I still think that if there's a way to edit the cache file and change the
devices that might do the trick.

Thanks for all the help,
Rumen Telbizov


On Fri, Oct 29, 2010 at 5:01 PM, Artem Belevich <fbsdlist at src.cx> wrote:

> On Fri, Oct 29, 2010 at 4:42 PM, Rumen Telbizov <telbizov at gmail.com>
> wrote:
> > FreeBSD 8.1-STABLE #0: Sun Sep  5 00:22:45 PDT 2010
> > That's when I csuped and rebuilt world/kernel.
>
> There were a lot of ZFS-related MFCs since then. I'd suggest updating
> to the most recent -stable and try again.
>
> I've got another idea that may or may not work. Assuming that GPT
> labels disappear because zpool opens one of the /dev/mfid* devices,
> you can try to do "chmod a-rw /dev/mfid*" on them and then try
> importing the pool again.
>
> --Artem
>



-- 
Rumen Telbizov
http://telbizov.com