Hello,   No, DSUM will not roll back a failed update.  Depending on where in the process it is, that would cause problems.   When doing upgrades, it's good to have a verified serial connection first.   Then if something does go wrong you'll be able to quickly work with support to resolve it.   Regards,  Don  
What happens if an update fails while running Dell Storage Update Mgr to update a series? Does it roll back to the previous firmware on the failed controller and then stop? I'm running fw 8.1.4 on 3 PS6210 series and I'm ready to upgrade to 8.1.8 since it's been out for awhile. I'll be trying out DSUM for the first time, and I have 2 groups - 1 with a 6210xs, and another with 2 6210x members. In the past, I've used Grp Mgr and done one at a time, so a fail would only affect one member. I've only had one failure in the past 10 years, and it was easily resolved, but I'd still like to know as much as I can going in. Thanks.
Firmware update planning