ReedMikelThis is a long shot, but any chance it's a power issue. In particular, a UPS compatibility issue with newer servers that have "green" power supplies that use Power Factor Correcting technology. The fact that you saw some log entries related to RAID seems to rule out a power issue, but just thought I'd mention it...
Want kind of events are logged from the raid cards when the servers lock up?
Coldfirex Was anything else running at the same time (audit, backup, VSS, kes scan, etc)?
ColdfirexHave you tried uninstalling KES temporarily?
scootrz32we use is Dell servers as well with Perc5 and Perc6 cards as well. We havn't had any issues. We use KES, but i don't install any of the additional componenets like Link Scanner, Web shield, ID Protection. Do you use any of the componenets?
ColdfirexLong shot, but is it possible there are remnants of the old AV install?