zfs discuss - Nov 2008 - Rewrite vdev label?

I have a situation where the first part of the first label on the vdev is
corrupted (from 8K to 16K on the slice).

Can I use a zfs/zpool command to rewrite that label from one of the other three?
So far I''ve tried

zpool update
zpool export
zpool import

Some zdb magic?

On Nov 11, 2008, at 11:13 PM, Dan Mick wrote:
> I have a situation where the first part of the first label on the  
> vdev is
> corrupted (from 8K to 16K on the slice).
>
> Can I use a zfs/zpool command to rewrite that label from one of the  
> other three?
> So far I''ve tried
I''m not aware of something like that being in zdb.

If you''re sure of the mangled zone (offset, length) you might just  
want to resort to dd''ing what you need off a good disk and then
dd''ing
those bits on to the ailing disk.

Or if the ailing disk is in a mirror set, just wipe and reattach it.

/dale