On Mon, Jul 19, 2010 at 9:06 AM, Max Levine <max...@gmail.com> wrote:
> Is it possible in ZFS to do the following.
>
> I have an 800GB lun a single device in a pool and I want to migrate
> that to 8 100GB luns. Is it possible to create an 800GB concat out of
> the 8 devices, and mirror that to the original device, then detach the
> original device? It is possible to do this online in VxVM.

I don't think you can do that within a single pool.  But you can fake
it like so:

zpool create newpool lun1 lun2 lun3 lun4 lun5 lun6 lun7 lun8
zfs send oldpool | zfs recv newpool
zpool destroy oldpool
zpool rename newpool oldpool

The commands are not exact, read the man pages to get the exact syntax
for the send/recv part.

However, doing so will make the pool extremely fragile.  Any issues
with any of the 8 LUNs, and the whole pool dies as there is no
redundancy.

-- 
Freddie Cash
fjwc...@gmail.com
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