Hi Suresh

ONTAP upgrades should not cause LUN serial numbers to change, so resignaturing should not be necessary.  If LUN S/N do change, change them back and ESX should rescan and be happy.

Before you start, collect “lun show -v”.

After upgrade, look at lun show -v again and compare LUN Serial#.

If they changed, for each LUN

lun offline  <lun>

lun serial <lun> <old_sn>

lun online  <lun>

Share and enjoy!

Peter

From: Suresh Rajagopalan [mailto:SRajagopalan@williamoneil.com]
Sent: Friday, March 26, 2010 9:15 PM
To: toasters@mathworks.com
Subject: LUN resignaturing

We’re running some ESX 4.0 hosts with VMFS and RDM LUNs on our filers running 7.2.6.1.  We are planning a upgrade to 7.3.2

Should we expect  to do LUN resignatures on VMware after the upgrade?

Thanks

Suresh