Posted 31 October 2007 - 09:26 AM
I would just go to Disk Management and see what drives are reflected as installed (Disk 0, Disk 1, etc.) and compare that to what appears in the BIOS and what appears in My Computer.
Ideally, all three should agree.
If a drive doesn't appear in My Computer but is reflected in the BIOS, there's a problem (loose connection, etc.) with that drive. My experience is that the BIOS is the prime referent to be used, I've not seen a drive not detected in the BIOS but functioning (unless it's one of those old motherboards which don't do autodetection of drives installed).
Event Viewer does a good job of monitoring drive problems, IMO.