zpool vdev vs. glabel

[Jeremy Chadwick]

On Wed, Feb 10, 2010 at 09:24:12AM +0100, Gerrit Kühn wrote:
> On Tue, 9 Feb 2010 13:27:21 -0700 Elliot Finley <efinley.lists at gmail.com>
> wrote about Re: zpool vdev vs. glabel:
> 
> EF> I ran into this same problem.  you need to clean the beginning and end
> EF> of your disk off before glabeling and adding it to your pool.  clean
> EF> with dd if=/dev/zero...
> 
> Hm, I think I did that (at least for the beginning part).
> Maybe I was not quite clear what I did below: I removed and re-attached
> the *same* disk which was labelled with glabel and running fine brefore.
> The label was there when I inserted it back, but zfs went for the da
> device node anyway.
> If I see this problem again, I will try to wipe the complete disk before
> re-inserting it.

If I remember right, glabel metadata is stored in the last sector of
the disk, not the beginning.

"glabel clear" would probably be easier than dd if=/dev/zero'ing the
entire disk.

-- 
| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |