No SAN in general is going to magically handle a RAID array failure. A specific answer depends on what exactly happened.
If there's a concern that RAID5 isn't enough because two disks may fail - RAID6 / RAIDMP is often the answer. Most modern SANs will reserve spare capacity in one or more disks allowing for hot rebuilds. It's easy to setup a RAID5 array, sit around and do nothing when a disk fails, and then get upset when a second one fails and the RAID is offline. More than one person on this forum has recommended the use of RAID0. In short, any SAN is only as intelligent as you are.
You certainly have a few options, but unless you involve "buy a second SAN and replicate", it's only marketing hype. HP's Lefthand promise full array redundancy with a single SAN but that's only because one "SAN" is purchased as a cluster of two mirrored units.
In your case, if you suspect a RAID issue, can't you logon to the SAN's interface and have a look? Any complete RAID collapse should be splattering your screen in red lights and failure alarms.