During POST you can see the names and configurations of IDE devices just before it starts loading Windows. As for rpm specs, i don’t know unless you check the literature that it came with or read the label on the drive itself. Ask the place that installed it for you.
In windows XP if you open My Computer, right click on the drive in question and go to Properties¦Hardware it should give you a make and serial number. Go to the manufacturers website and look up that serial no.