Hi all,

we are planning tomorrow upgrading two snapmirrored F740s from 5.3.7R3 to 6.0.3 .

Questions: 1. Which system do we upgrade first? ( destination or source filer ? )

2. Turn OFF snapmirror prior to upgrade?

3. At what time can I restart the mirror ?

-- after "vol status -c" tells me checksums are active ? Note: This could last probably two weeks until there are no 5.x snapshots anymore.

-- or directly after both filers are up with the new Ontap 6.x ?

-- is it necessary to delete all snapshots - to speed up the WAFL upgrade on both systems -- or is it ok to delete just the snapshots on the destination filer ?

4. And is there something else to consider ? I did not find any doku on this.

Thanks for help and advise Phil