re-adding a replacement into a pool of mirrors

[Randy Bush]

>>> It might be worth zeroing the whole disk with dd if=/dev/zero
>>> of=/dev/da1s3 bs=64k, and then see if you can re-attach.
>> went single luser, zapped the drive, took a nap, then
>>    zpool attach tank da0s3 da1s3
>> worked.  so geom did have it!
> I'm not sure geom had it more than the slice had a zfs label on it and as 
> a foot-shooting precaution it did not want to let you add a device 
> from another pool to the existing one. Just a guess, though. Was the 
> replacement drive brand new?

yep, brand new.

randy