Wow it's been a while.
Anyway, my now 3yo Aspire 5739g came with an Optiarc AD-7585H. It has never been great from the very start. It would take forever to read discs and has never successfully burned one (not a big problem as I use my main rig for burning anyway).
According to the Optiarc site the drive was obsolete before I bought it (new) so there was never any official f/w for it. So I just learned to live with it as a dodgy read only drive. Over the years I've tried fixing it occasionally by re-flashing with a Dell KD03 f/w in the hope that it might kick it up the arse but it has never fixed anything.
I want to reinstall my OS so I came to need the drive again only to discover that it wasn't working at all. I took it out cleaned it up and flashed (yet again :)) with KD03. And it reads discs again but it's still not great.
It would seem that the KX04 version is the most up to date but I can't find it anywhere. :sad:
Here's some current (and probably random and unhelpful) info on it.... (check out the recognition time )