Hello Kory,

Tuesday, January 15, 2008, 5:47:31 AM, you wrote:

KW> We have a Mirror setup in ZFS that's 73GB (two internal disks on
KW> a sun fire v440).  We currently are going to attach this system to
KW> an Equallogic Box, and will attach an ISCSCI LUN from the 
KW> Equallogic box to the v440 of about 200gb.  The Equallogic Box is
KW> configured as a Hardware Raid 50 (two hot spares for redundancy). 

KW> My question is what's the best approach to moving the ZFS data
KW> off the ZFS mirror to this LUN, or joining this LUN to ZFS but not
KW> have a ZFS mirror setup anymore because of the disk waste with the
KW> mirror setup.  Whatever the approach is the current data cannot be
KW> lost, and the least downtime would help too.  I thought the best
KW> approach might be to create the LUN as a 200 GB ZFS pool, and then
KW> do a ZFS export from the 73GB drive and a ZFS import on the 200 GB
KW> iscsci LUN. This LUN would still be setup as a RAID 50 even though
KW> its a ZFS file system so we would still have some redundancy and
KW> we could eventually grow this pool.  Or would it be better to go
KW> UFS on the LUN and copy the data over?

KW> What would be the best approach for moving this data or
KW> configuring the disks involved?  I'm open to any suggestions?

So you've got a mirror of two 73GB disks and you've got an iSCSI lun
which is 200GB in size. You should be able to attach that iSCSI lun
and create 3-way mirroring and once it's synchronized you should be
able to detach two 73GB disks. After you detach 73GB disks the pool
should grow automatically. Make sure to use zpool attach and *NOT*
zpool add.


-- 
Best regards,
 Robert Milkowski                            mailto:[EMAIL PROTECTED]
                                       http://milek.blogspot.com

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