Molarmac and ColorOne scanner

[beachycove]

I have a G3AIO (MolarMac) running MacOS9.1 that refuses to recognize a ColorOne Scanner connected to its SCSI port. The ColorOne is terminated properly. The cables seem to be fine, in the sense that they work fine, as indeed does the scanner, when connected to other machines.

The G3AIO has an internal scsi Zip drive, terminated as usual, and this zip drive is working flawlessly. The ColorOne software is installed, and has been reinstalled just to be double sure.

Is the external scsi port blown, or could there be another explanation?

 

[Temetka]

Do you have any other external SCSI devices you can hook up to test the port?

 

[beachycove]

'Blown' was too strong a word. 'Flaky' is I think the better term to use.

The trouble first appeared a year or so ago when I first got the machine and tried to connect a PowerBook via scsi — and failed to get the scsi icon dancing around the screen as expected. I tried and retried, used all the cables locally available to beachycovekind, then finally muttered something dark and moved on.

This weekend, however, I found myself wanting to connect the ColorOne scanner to the thing,my Quadra 650 scanning station having ceased to function (caps, probably), whereupon I failed once more. The odd thing is that the G3AIO will recognize an ordinary external hard drive on its scsi bus, and that external drive will pass the usual HD diagnostic tests, but for some reason, the external scsi port will not work with a powerbook, or a scanner.

It could, I suppose, be that it needs a more emphatic scsi termination than either the powerbook (a Wallstreet) or the scanner can provide. I lack the necessary cable to connect first the scanner and then the terminated drive in series, but I suppose that would be the next step.

 

[Charlieman]

Have you tried installing the ColorOne scanner without a terminator? I recall that this was the only way to get it to work for me many years ago with a 7100. I had chimes of death of startup with an error code that indicated a SCSI problem, so my diagnosis didn't take long.

Additionally, have you installed SCSI Probe? It is a handy tool for basic SCSI troubleshooting.