>>>>> "m" == mike  <[EMAIL PROTECTED]> writes:

     m> can you combine two zpools together?

no.  You can have many vdevs in one pool.  for example you can have a
mirror vdev and a raidz2 vdev in the same pool.  You can also destroy
pool B, and add its (now empty) devices to pool A.  but once two
separate pools are created you can't later smush them together.

but...since you bring it up, that is exactly what I would do with the
16 disks: make two pools.  I'd make one of the pools compressed, make
backups onto it with zfs send/recv, and leave it exported most of the
time.  Every week or so I'd spin up the disks, import the pool, write
another incremental backup onto it, scrub it, export it, and spin the
disks back down.

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