I like DeBug. It removed all partitions and gets the drive ready for Format.
You can download it from Dells website. Do a search
http://support.dell.com/us/en/search/kbadv_search.asp on Dells Knowledge Base website for " debug"
The program will create a bootable diskette.
Boot from the disk and run these commands.
From the A:\> prompt, type the following commands and press the <Enter> key after each command:
debug -F 200 L1000 0 -A CS:100 xxxx:0100
MOV AX,301 xxxx:0103
MOV BX,200 xxxx:0106
MOV CX,1 xxxx:0109
MOV DX,80 NOTE: Type 80 for the Main hard drive - HD 0, or type 81 for the Second hard drive - HD 1
xxxx:010C
INT 13 xxxx:010E
INT 20 xxxx:0110 (Leave this line blank and press the <Enter> key)
-
G The message, Program terminated normally, appears.
Press the power button to turn off the computer.
When the computer starts again, the hard drive must be partitioned and formatted.