NOTE: I only recommend doing this if you have 256mb of RAM or higher.
STEP 1: Start > Run > then type SYSEDIT.EXE
STEP 2: Expand the system.ini file window.
STEP 3: Scroll down almost to the end of the file till you find a line called [386enh]
STEP 4: Press Enter to make one blank line, and in that line type
NOTE: The above info for the new line is case sensitive
STEP 6: Select File > Save
STEP 7: Close SYSEDIT and reboot your computer
NOTE: Once your computer has been rebooted, you should notice a change in your hdd's performance. I have tested this on IDE hdd's and it has worked fine. I've read in a few locations online that it could possibly work for SCSI disks but I don't have any to attempt the theory. If someone does test it and can vouch for the SCSI's improved performance, please let me know.