http://www.tavi.co.uk/ps2pages/ohland/CDROMII.html
Installing IBMCDROM.SYS
From Peter
Assumed, you installed an IBM SCSI-Adapter or used the one in your
machine (card or onboard) to connect a SCSI CD-ROM drive to it. The adapter
is recognized in the setup and so is the CD-ROM drive. But you cannot access
it. What's wrong ?
Do the following: get the SCSI CD-ROM Driver Disk SCSICDRM.EXE, extract
it to a 720K / 3.5" disk run the UINSTALL-program from the disk to install
the device-driver IBMCDROM.SYS. Use a Text-Editor to add /i in your
CONFIG.SYS at the end of the line with the IBMCDROM.SYS If you have a CD-ROM
(like some NEC) and it refuses to work even after adding the /i try to add a
/P:2 as well to enable the read seek command on this unit too. (Thanks White
Box !) restart the system
This little /i will convince the IBMCDROM.SYS to accept all CD-ROM
drives, which do not have the !x-sign in their device descriptor and
therefore are recognized as Non-IBM devices. Works fine with NEC, Toshiba,
Panasonic, Sony etc. BTW.: It pays to read the README-file on the
SCSICDRM-disk ...
Editor's Note: I have had to use the /i switch to get an IBM CD ROM (first
model) to be recognized. But the rebadged Toshiba XM3101BME works under DOS
6.22 and WfW 3.11.... Also, a no-brainer is the /D:drivername must be the
same in CONFIG.SYS as well as the AUTOEXEC.BAT or you will spend 30 minutes
or more looking for a hardware problem that isn't...