We have a Xsan volume consisting of 1 LUN made up of 3x400GB drives
in a RAID 5 configuration - ie a notional 800GB LUN. We would like
to add some additional space to this volume, and have installed 7
additional 500GB drives on the second controller of the Xserve-
RAID. To add this discs I believe we need to slice this second RAID
set into 3 833GB LUNs.
If I do this will these new LUNs be addable to the existing Xsan
volume? The documentation emphasises that the LUNs must be the same
size, but I'm sure at some Apple briefing I attended they mentioned
that LUNs greater that the original LUN size just lose the
additional space.
Has anyone tried this?
Yes I do, like LVM, you lose all over less given LUN.
Sticking my hand up *very* coyly, can you not just add an additional
storage pool containing the new LUN and have the new LUN made
available to the volume in its entirety?
Yes sure, but you lose benefit of affinities - if you use them.
You have to top volume to add storagepools or Luns.
I am very much a Xsan newbie, but this is the impression I got from
the manual.
The manual - and all of the MacOsX Server - is very basic and click-
oriented.
Cheers!
--
bryan
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LucOl
ACSA10.4 (Xsan, Deploy, DSIA, SBP)
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