I think you can stick on the same 5.6 train as there is a later version that supports Flare 30 - don't know if you can mix that on a unified system though or if it is disruptive.  I just upgraded my Celerras to 6.0 Tuesday night - according to my NMS, the DMs were unavailable for 6 minutes.  The Clariion upgrades were completely non-disruptive.  Dan
We have a CX-4 that has a Celerra attached to it. It was sold to us as "unified" storage. We wanted to upgrade the Flare code on the CX to release 30 to use fast cache and configure FAST. I was told yesterday that the Celerra also has to be upgraded to version 6 (currently on 5.8?) as part of this.  In order to upgrade the Celerra to the next higher family of code, it requires a complete reboot of both datamovers at the same time which will take about 15 mins.  I was shocked to hear that because a) I can't get 15 mins of downtime ever b) I remember upgrading Celerra's in the late 90s and I didn't have to reboot the entire system.  Can anyone confirm that the downtime is truly a requirement for the upgrade?
Downtime to upgrade to latest version? I am shocked!