zfs discuss - Nov 2007 - What is the correct way to replace a good disk?

I have a 9-bay JBOD configured as a raidz2.  One of the disks, which is on-line
and fine, needs to be swapped out and replaced.  I have been looking though the
zfs admin guide and am confused on how I should go about swapping out.  I though
I could put the disk off-line, remove it, put a new disk in, and put on-line. 
Does this sound right?

Any help would be great
Thanks
Chris
 
 
This message posted from opensolaris.org

Chris,

You need to use the zpool replace command.

I recently enhanced this section of the admin guide with more explicit
instructions on page 68, here:

http://opensolaris.org/os/community/zfs/docs/zfsadmin.pdf

If these are hot-swappable disks, for example, c0t1d0, then use this syntax:

# zpool replace pool-name c0t1d0

ZFS recognizes that this is a replacement disk in the same location.

You don''t need to offline the disk to be replaced unless it is failing
and making the pool unhappy.





Chris Williams wrote:
> I have a 9-bay JBOD configured as a raidz2.  One of the disks, which is
on-line and fine, needs to be swapped out and replaced.  I have been looking
though the zfs admin guide and am confused on how I should go about swapping
out.  I though I could put the disk off-line, remove it, put a new disk in, and
put on-line.  Does this sound right?
> 
> Any help would be great
> Thanks
> Chris
>  
>  
> This message posted from opensolaris.org
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

On Fri, 2007-11-02 at 11:20 -0700, Chris Williams wrote:
> I have a 9-bay JBOD configured as a raidz2.  One of the disks, which
> is on-line and fine, needs to be swapped out and replaced.  I have
> been looking though the zfs admin guide and am confused on how I
> should go about swapping out.  I though I could put the disk off-line,
> remove it, put a new disk in, and put on-line.  Does this sound
> right?  
That sounds right.  You''ll have improved availability if you have a
spare disk slot and can do "zpool replace $pool $old $new", but
offline
followed by a reconstruct-in-place via "zpool replace $pool $disk"
also
works.

					- Bill