IBM ThinkPad T20 PIII700MHz 512RAM. FireWire PCMCIA card connected to
enclosure that contains SONY DRU-120A DVD+RW drive. Windows does not
recognize this drive as CD-ROM, but as a "removable disk". There used
to be an NEC ND2500 DVD burner in the same enclosure, connected via
the same FireWire cable & PCMCIA card & worked fine. Then I installed
a SONY DRU-510A drive instead, which also worked fine. Then I
attempted to perform a firmware upgrade (to its existing 1.1a) in order to make the
DRU-510A region-free. The flash upgrade went smoothly, w/o any error
messages, but in the end, W2K stopped seeing the drive as CD-ROM (it
said it was "removable disk"). I removed DRU-510A & put it to another
PC, where is has been working fine. I then placed the DRU-120A into
the enclosure & it still sees it as "removable disk" & not as a CD-ROM
drive. I have a separate Windows XP Prof installation on the same
ThinkPad. The drive is also not seen as CD-ROM from Windows XP! I am
clueless.