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Technical info - Driver Information

MS-DOS and Windows 3.1X

There are three components that drive a SCSI CD-ROM drive:
  1. An ASPI manager, the interface module unique to the SCSI Host Adapter in your system,
  2. The device driver, a module that enables your Plextor CD-ROM drive or other SCSI devices to receive communication from the PC and transfer data back.
    • Each type of device requires a unique device driver
    • The device drivers are normally included with a controller when it is purchased
  3. The CD extension program, a method that allows the Operating System to read the ISO 9660 standard.

If you need to replace a set of lost drivers, most SCSI manufacturers will charge a fee. Your reseller may be a good source, but we are not permitted to provide someone else's licensed software to the public.
If you are changing platforms, you will need to purchase a current driver version from the manufacturer of your host adapter or a vendor.
For upgrades, most SCSI manufacturers will provide a free upgrade version that will only work if you already have a version.

The Command lines in your CONFIG.SYS should resemble the following examples:

DEVICE=[C]:\[DIR]\aspimanager.sys /D
DEVICE=[C]:\[DIR]\CDdrive.sys /D:CDROM

Where the bracketed C represents the drive in which your SCSI files are stored, and the bracketed DIR is their directory.
CDROM is a device name that simply provides reference for the CD extension to follow.

For the CD extension, Microsoft's MSCDEX.EXE is the more common file included in most SCSI installation programs and shipping with DOS 6.x, Windows 3.11 & Win95. It's appearance in your AUTOEXEC.BAT should resemble the following:

[C]:\[DIR]mscdex.exe /D: CDROM /M:10

Windows '95/98

It is important to note that the Plextor drives have no direct support in Windows 95/98. The drivers are specific to the SCSI host adapter, and if your controller is supported by Windows 95/98, you have all that you need for operation.
A quasi-complete installation procedure follows; the main focus being at the controller level. As always, if the information provided does not completely address your CD situation, leave us a message at

Installing a SCSI Device in Windows '95/98

  • Click Start
  • Select Settings
  • Select Control Panel
  • Select Add New Hardware
  • Click Next, No, Next
  • Select SCSI Controllers
  • Select your Host Adapter by Manufacturer and Model.
Windows will install the drivers for your controller and assign new resources, record them and finish the installation. Before you restart, you will need to verify that the I/O port, Memory range, and Interrupt on your controller match those assigned by Windows. Change the card if necessary.
  • Click Start
  • Select Run
  • Type SYSEDIT, Click OK
  • Select the file labeled CONFIG.SYS and locate the drivers for the SCSI controller and devices.
  • Type REM in front of the drivers.

  • Save file and exit System Editor
  • Reboot
  • verify CD-ROM is present in MY COMPUTER
Typically, this procedure will provide CD access through most Host Adapters supported in Win95/98. If your host does not appear in the supported list, you will either need to contact the SCSI manufacturer, replace your controller, or operate with the DOS drivers.

Windows NT

Installing on an existing NT station:

All the support required to operate a SCSI CD-ROM in Windows NT ships with NT and is specific to the Host Adapter. Should you have trouble installing with the boot floppies, we suggest that you load the dos drivers to gain access to the CD-ROM, and from the I386 Directory on the NT CD-ROM, type Winnt/b This will load the Operating system onto the hard drive and reboot, loading necessary drivers at the same time.

If the Drive does not show as "started" after rebooting:
  • Access the Setup box and select Options.
  • Use the Add/Remove SCSI Adapter Feature to remove, and then reinstall your controller. Ensure that your SCSI CD-ROM boot option is set at system and reboot.
  • That's it!
The process would only vary if your controller was not supported by NT. The only additional step would be to obtain an NT driver from the SCSI Host manufacturer and insert the disk when prompted.

IBM provides all the drivers necessary to operate a SCSI CD-ROM drive in OS2. However there is an add file required for the Host Adapter. It is supplied by your SCSI Host manufacturer.

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