PM 7200 doesn't see CDs, but boots up from them

[Star Explorer]

This happened once 2 or 3 years ago, and I read somewhere that if you put a space before an extension filename like " Apple CD-ROM", it will load the extension sooner in the boot process, but I can't find that source anymore. It fixed it last time, but it's not doing the trick this time.

I just installed Mac OS 7.6.1 a couple days ago. I've also read of other people having strange problems with the 7200.

Another weird thing that happens is sometimes the computer will corrupt the desktop pattern prefs file, and the pictures look all messed up. It also affects the scrollbars and the titlebars. If I delete the desktop pattern prefs file, it fixes it next bootup.

I can't figure out any setting or configuration that will fix the no CD problem.

Any help would be greatly appreciated, so that I can fix it in the future when it happens again. Thank you

 

[ClassicHasClass]

Do other SCSI devices work properly? This sounds like something weird on your bus.

 

[jibsaramnim]

Is this with an original Apple CD-ROM drive, or a third party replacement by any chance? I might be way off the mark here, but this sounds very similar to how things work when using external third party drives that require a patched extension to work, so I thought I'd mention it just in case.

 

[Star Explorer]

The only thing on the SCSI bus right now is the CD-ROM. I have a Sonnet Tempo Trio installed, which I run my hard disk on. Now it isn't even booting from the CD drive. I literally have spent a week on this computer. I just wish it would stay consistent. It's always doing random weird crap. It's more unpredictable than predictable.

The CD drive has done this before, but snapped out of it. I used to think it was a bad CD drive, but when I put the space before the extension filename back then, loading the extension earlier fixed it. But even in Mac OS 9.1, it does weird things sometimes.

@jibsaramnim it's the one that came with it, so an Apple drive. That's really interesting! I never heard of a patched CD-ROM driver before. What would just all of a sudden cause it to do this? Sure the drive might be physically bad, but it only started not being able to read CDs within the last day or today, because like I said, I installed 7.6.1 2 days ago. I'll try that, thanks.