Question on LUN Sizes for storage migration

From: Kumar Madduri <ksmadduri_at_gmail.com>
Date: Wed, 21 May 2014 03:13:31 -0700
Message-ID: <CAHDOOG4m9ZKSkc=aMD_XWqY-x2jFPX3AOx3bg14bb4WxpzaNEw_at_mail.gmail.com>

We were originally given 90 GB LUNS.
As part of storage migration to another vendor, we are being provisioned with 500 GB LUNS.
From a migration point of view, is it ok to move the data from 90 GB LUNS ton 500 GB LUNS. We would have 20 90 GB LUNS (old storage) and 4 500 GB LUNS (new storage)

alter diskgroup DATA
drop disk
'/dev/old-lun1 -90-gb', '/dev/old-lun2-90-gb' ...., '/dev/old-lun20-90-gb' add disk
‘/dev/new-lun1-500gb’, ‘/dev/new-lun2-500gb, ’, ‘/dev/new-lun3-500gb, ’, ‘/dev/new-lun4-500gb, ’ ;

Concern is, would it be better to stick to 90 G LUNS on new storage as well or move to 500 GB LUNS as above (as part of migration). Our concern is would it slow down migration if we alter the lun sizes as part of migration process.
Our Unix/Storage admin prefers the 500G LUN because they say it will reduce the time for reboot (when required) if we have fewer number of LUNS.

Thanks again for time.

• Kumar

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Received on Wed May 21 2014 - 12:13:31 CEST