HP Compaq ProLiant DL380 G4 Server "logical drives disabled due possible" Questions

logical drive has been disabled due to possible data loss Our server has the "attempting to boot from hard drive....attempting to boot from cd rom....non system disk or disk error, remove and ...

...logical drives are disabled because of a problem. rebooting produces the following message: 779 - Slot 0 Drive Array - Replacement drive(s) detected OR previously failed drive(s) now appear to be ...