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CD-ROM drive not being detected

Posted on 1997-08-04
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Last Modified: 2008-03-03
Since I installed my second HD about a year ago, I've been dogged by a most perplexing problem.  I have a Mitsumi 4x CD-ROM drive connected to my Sound Blaster 32 PNP because my IDE interface card is only a single port and I have two hard drives connected to it.  Windows 95 has always detected the CD-ROM drive just fine but DOS would not.  I'd get the following message when loading config.sys:

ERROR: Unable to detect ATAPI IDE CD-ROM drive.
ATAPI IDE CD-ROM device driver not loaded.

I'd gotten this message consistently for a year whenever I'd try to load my DOS CD-ROM driver.  After a little reading, I discovered that what I'd been lacking is a simple parameter in config.sys pointing to the base port address and IRQ specification.

/P:168,10

Easy enough.  Problem solved...for about 24 hours.  I eventually reached the point where I'd get the same message again.

ERROR: Unable to detect ATAPI IDE CD-ROM drive.
ATAPI IDE CD-ROM device driver not loaded.

I began to get a little frustrated needless to say because I'd already solved this problem!  Turned out, all I needed to do was to remove the audio CD from the CD-ROM drive.  Problem solved again...for about 3 hours this time.  Later that day, I rebooted again and guess what message I got:

ERROR: Unable to detect ATAPI IDE CD-ROM drive.
ATAPI IDE CD-ROM device driver not loaded.

So I've solved this problem twice and yet it still lives!  I'm beginning to think this is more the jurisdiction of a priest rather than a computer troubleshooter.

Any clues?  Thank you.
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Question by:guardian angel
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CountZero earned 200 total points
ID: 1012121
I want to make sure I understand you correctly... your CD-ROM has ALWAYS worked in Win95.  It didn't work in DOS until you added that extra line.  It actually worked for 24 Hours (By that I mean you read a CD FROM DOS) and then it stoped.  You eject the Music CD from the CD-ROM and it worked for about three hours.  Hmmm... The audio CD should have no affect.  One thing I do know is in order to use a PnP device in DOS, you must first run a PnP configuration Manager.  Creative has one called CTCM.  You can download it from their site http://www.creativelabs.com/ or I can Email it to you.
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by:CountZero
ID: 1012122
BTW - the PnP device that needs configuring is the Sound Card since your CD-ROM is attached to it.
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by:guardian angel
ID: 1012123
To answer your questions, yes, Win95 has always detected my CD-ROM drive.  DOS *never* detected it with or without the plug and play config manager (installing that was the first thing I tried) until I added the port address and IRQ parameter in config.sys which I added *without* the configuration manager.  As I said, this didn't last.  It just so happened that, after removing an audio disc, the drive mysteriously showed up again.  I agree that this *shouldn't* have anything to do with it but one never knows.

I discovered that there *is* a line in my dosstart.bat file that loads the creative PNP configuration manager so I suspected that the successful attempts to load the driver were after a return to MS-DOS "mode" a second time.  I tried to recreate this but I had no luck.  No matter what I tried, I could *not* get it to load as it had several times before.  What has me so confused is that it seems to be a hit or miss (mostly miss) situation.

I suspect that you are correct about the PNP config manager and I'll let you know tomorrow what happens.
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by:guardian angel
ID: 1012124
No big surprizes here. The PNP configuration manager worked. What still has me confused, however, is that the drive was ever detected in the first place without it. Thank you.
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