Thanks Peter and everyone else that replied. I will share my procedure/experience once our head-upgrade is completed.

Darish.

From: Learmonth, Peter [mailto:Peter.Learmonth@netapp.com]
Sent: October-24-07 1:38 PM
To: Darish Rajanayagam
Subject: RE: Head upgrade 3020 to 3040

IQNs will stay the same.

LUN S/Ns will change.  You should keep a copy of lun show -v from before the upgrade, then set them S/N back the way they were after the swap.

lun offline <lun path>

lun serial <lun path> <serial number>

lun online

(Do this before bringing servers back up)

This is especially important for VMware in order to avoid resignaturing VMFS and having to re-register VMs.

IP addresses will stay the same.  Not sure about MAC addrs, but I don't think that matters.

Peter

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From: Darish Rajanayagam [mailto:darishr@softcom.biz]
Sent: Wednesday, October 24, 2007 9:41 AM
To: toasters@mathworks.com
Subject: Head upgrade 3020 to 3040

Greeting Toasters,

We will soon be upgrading our FAS3020 filer to a FAS3040. The two main protocols the filer is used for is NFS and ISCSI. I am concerned of the implications this upgrade will have on the iscsi network. Has anyone done this type of migration and can share their experience with me? Will upgrading the head unit impact iscsi iqns, lun serial numbers etc?

Thanks,

Darish.