On a HP DL380 G4 server I'm having some problems with the system hanging periodic. As far as I can see, this happens when the server writes to disk (RAID 1 - on integrated controller). I cannot see what is written to the disk. This is not coursed by swapping, since the server are not using all of the installed memory. The server is a SBS 2003, and handles mail and logons. All user files are moved to a different server. The Exchange queues are small, and we are not spammed.
HP Smart Array Diagnostic does not reveal any errors, and the HP System Management cannot see any errors either.