we do not utilize CIFS and we have no non production filers to verify/test on :)

NDU works for us but yes i agree with you on all points here.

-- Daniel Leeds Manager, Storage Operations Edmunds.com

-----Original Message----- From: Scott Miller [mailto:Scott.Miller@dreamworks.com] Sent: Tue 9/25/2007 3:24 PM To: Leeds, Daniel Cc: Kennedy, Jeffrey; Borzenkov, Andrey; philip.boyle@eircom.net; toasters@mathworks.com Subject: Re: ONTAP UPGRADE - FEEDBACK REQUEST

I'm with Jeff. A reboot takes less time that failover/failback, and I'd rather have CIFS shares disconnect and re-connenct just once.

Rather than NDU, I upgrade both heads and then reboot them at the same time. After having tested the new release on non-critical filer resources, of course ;-) reboots occur during non-peak times or during scheduled maintenance windows, when possible.

-skottie

Leeds, Daniel wrote:

NDU is highly valuable when you are running 24x7 environments with live active data. We have had alot of success with this but still prefer a scheduled upgrade downtime if possible. Both work great. :)

-- Daniel Leeds Manager, Storage Operations Edmunds.com

-----Original Message----- From: owner-toasters@mathworks.com on behalf of Kennedy, Jeffrey Sent: Tue 9/25/2007 11:16 AM To: Borzenkov, Andrey; philip.boyle@eircom.net; toasters@mathworks.com Subject: RE: ONTAP UPGRADE - FEEDBACK REQUEST

NDU really isn't is it? CIFS connections are still severed and NFS survives both an NDU and a reboot easily enough.

I've never understood the value of NDU honestly but if someone has a success story I'd be interested to hear it.

Thanks.

Jeff Kennedy

QCT Engineering Compute

858-651-6592