This is on a friends pc so details aren't great...
He installed Service Pack 2 and his second hard drive disapeared, its visable to bios, but windows does not see it.
Remove SP2, hard drive comes back...
He tried converting the drive to a dynamic disk and the same thing happens, SP2 = No hard drive, remove SP2 = hard drive shows up...
Wierd...
His mainboard is an Asus (model K7M) and his drives are maxtors...
Anyone have any idea whats going on here?