put the drive in another machine and format it. Or install this drive as primary and use your windows 98 CD to start an install and follow the instructions until it finishes formating, then shut down the machine.
or Boot into DOS with this drive as a master and format there
Windows will not assign a drive a letter if it is not partitioned and formated.
A+, Network + , HP Certified Tech and MCP
Specs: AMD Phenom II X6 1095T, Asus M477TD, 8GB GSkill Ripjaws DDR3 1600 7-8-7-24 1T, 128GB Crucial M4 SSD, ATi HD4650, W7, 27" HL272 Monitor