I have a IBM 75GXP 30 gig. Sometimes it is detected by my bios, sometimes it isn't. When it isn't it usually comes back the next day or in a few hours. But now its been a few days since I couldn't get my hard drive detected. When I go into the bios and try to detect it, the HD light goes on then goes off and it doesn't detect a hard drive. When I boot up and it is looking for a drive, my system hangs for a few seconds then just detects my cd drives.