I detailed how I also had issues....

Instead of calling support I filed an online inquiry. Within an hour I had my first reply. Adaptec do 24hour support by using locations around the world. The guy that helped me out was from Australia. Awesome support experience.

First start by updating the firmware on your Plextor to the latest. Go to the BELGIUM Plextor site and grab the latest firmware.

Next, update to the latest Adaptec BIOS for your card.

Next, install ASPI version 4.60 from Adaptec's site. NEVER MIND about their warning that it's not supported under 2K, ME and XP. It works fine. It's just not tested because with Microsoft's direct CD support it's not normally needed (yeah right). If the installer give you a warning, IGNORE it.

This was some suggested Adaptec BIOS changes:

In reply to:

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First of all please enter SCSISelect at boot time, chose Configure/View HBA settings, then press F6 and say yes to load defaults. Then chose advanced and disable domain validation. Go into SCSI Device configuration and disable wide negotiation for all narrow devices (50pin or 25pin). Having done this save changes and exit.

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The following is the driver info I used for Win2K...

In reply to:

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The final step is to upgrade the driver to the latest version which is contained in the file FMS on CD v4.0aSP3.
The driver is in the Win2000\Adf6u160 subfolder. Please make a backup of your registry before doing this, as if this procedure goes wrong the system may become unbootable.

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For me, the driver update is what finally fixed the problem. It was a relatively new update that I hadn't previously noticed on the site.

The link for the driver has now changed, but I have a zip file which I made of the subfolder mentioned above. If you can't find a suitable driver on their page, email me and I'll send you the files.

Bruno