[Shiromagius]

I tried to boot up my computer the other day and my bios failed to detect my primary master (hard drive with my OS on it) correctly. The hard drive is a Maxtor 13.6, but it detected it as a Maxtor ORION with about 6.3 gigs. I went into the bios and tried changing a few things around on how it gets detected, restarted and nothing changed. So i turned my computer off, unplugged it, took the HD out of its carrier (still connected) and jotted down all the cylinder/head/sector information. I then plugged my computer back in and turned it on and everything worked fine. My question is why did my bios fail to detect my hard drive correctly when everything is set on "Auto detect" and also what did I do to make it work again? The only thing I can think of is unplugging and re-plugging the power cord. Any ideas?