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#1 (**permalink**) 01-05-2008, 07:03 AM

We have a raid5 disk array on a DS4300 . This is connected to the vio .
Behind the vio will be 4 partitions . How should i carve up the disk
storage on the ds4300 ? We will be using the ds4300 for our system and data
for the 4 partitions.

.. should i carve up say 2 big chunks , say 1 for system disk and 1 for data
disk on the 4300 . The disks can then be further divided up into smaller LVs
on the vio ie on the system luns i divided it into 4 equal lvs used only for
the rootvg/system . And the other lun used only data (divided into 4 lvs)

.. should i just carve up the ds4300 into say 8 luns , ie 4 for system/rootvg
and 4 for data for the 4 partitions.

.. should i carve up the ds4300 into 4 luns . Then at the operating levels of
each partition further divided then into / and /data

What do you think are the advantages/disadvantages of each , any performance
hit with any of the 3 scenarios ?

Thanks
Tiong

#2 (**permalink**) 01-05-2008, 07:04 AM

if you're the person who manages both VIO and DS do carve all the disks
on DS -- it will save you time and lot of problems... and if you
decided to go with dual VIO and MPIO you would not need to reconfigure
everything from scratch, same true if you decided to not to use VIO
anymore in the future... Virtualization is good to a point... and the
point is you should be able to go both direction -- using
virtualization and not, but data should be preserved at all time. Also
read differences on lv backed and disk backed virtual scsi disks in
VIOS documentation, I think you'll find it appealing.

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carving disk on the San or vio ?