Did the host report any issues?  Did it lose access to the LUN when you had the power issues, then come back when the power came back?  If so that wouldn't be a big deal, as no writes would be going to the LUN.  I think the CLARiiON is smart enough to try to fix issues with unowned LUNs when disks go offline, then come back in a non-degraded state.
 Hi, I had an incident couple of days ago that I cannot explain and I'm looking for some help.One of my shelves disconnected from the system (power issue).I’ve got a raid 5 that splits on two shelves (3 +2) and the shelves that failed was the one with the 2 disks. Even though the 1 hot spare was immediately started I don’t think the system could manage recover from losing 2 at the same time.When the lost shelve was re powered everything went back to normal.My question is:How the raid managed to continue to work even after losing 2 drives at the same time on raid 5?Many thanks,Eran
Raid 5 keep runing after loosing 2 drives