sounds like you might be using a dual boot with a linux and windows. or even possible of w98 and some other operating system. Linux and converted w98 with converted file system is the only ones that use the disc 1 _vol 1 identification for harddrives.

This would also make it look like there was more than one operating sytems.

How about telling what the operating system is and what is the bios page reporting (as you put it)