|Is the drive identified in Device Manager by model number? If it is the only IDE hard drive in the system see what the advanced properties of the IDE/ATA ATAPI controller says about the drive. |
Older drives like that may need to be jumpered as Master and Western Digital drives have a third selection for Master alone, which you should be using. Also, connect to the end of the IDE ribbon cable.
Probably a dumb question but when in Disk Management did you expand the box to full screen. The drive may be showing after the optical drives and would not show in the default screens.
Are you trying to recover files from that drive?