The firmware upgrade will only work on generic Quantum products. The way to find out if you have a generic drive is to look for the P/N number. The P/N is on a sticker that is located on the plastic data cable housing. For the Fireball ST the part number should read: p/n ST xxxx S 01(any number) REV zz-z Where xxxx is the drive capacity, S stands for SCSI, and 01(any number) is the customer code. Only drives that have the 01(any number) customer code are generic.
Additional information is posted on a page at the St. Clair Software web site.