|Is the drive running? You should be able to feel it rotating?|
Watch the POST screens at start up to see if the BIOS is identifying the drive by model and capacity. If the drive is NOT appearing in the POST screens then check the cabling and jumpers if the drive is an IDE ATA type (wide cable).
If two drives of any kind are connected to the same IDE cable then one must be jumpered as Master and one as Slave. OR both must be jumpered using CS (cable select). If you are using a second IDE controller verify it is Enabled in the BIOS screens.
Post back with feed back.