I don't think I've ever so much as seen an actual TAM, so I did not know the CD was scsi.
There could be a problem on the scsi bus, though, now that scsi has been mentioned. Cables can go bad; so can termination circuitry — but where would you get a TAM CD-ROM if you needed to replace one these days?
My most recent experience with a bus error message involved a dual 604e in a PCI Mac. The card (200MHz) was possibly too fast for the logic board, as a slower dual 604e (180MHz) works perfectly in the machine. I still need to test the 200MHz card in another machine. But in this instance, I had random freezes and also bus error messages that ceased with the replacement of the processor card.
What this suggests to me is that error messages generated by the system in some cases may not be especially helpful, and that it may be necessary to diagnose more systematically by swapping parts between the units one at a time. Painful, I know, but possibly necessary if all else fails.
There could be a problem on the scsi bus, though, now that scsi has been mentioned. Cables can go bad; so can termination circuitry — but where would you get a TAM CD-ROM if you needed to replace one these days?
My most recent experience with a bus error message involved a dual 604e in a PCI Mac. The card (200MHz) was possibly too fast for the logic board, as a slower dual 604e (180MHz) works perfectly in the machine. I still need to test the 200MHz card in another machine. But in this instance, I had random freezes and also bus error messages that ceased with the replacement of the processor card.
What this suggests to me is that error messages generated by the system in some cases may not be especially helpful, and that it may be necessary to diagnose more systematically by swapping parts between the units one at a time. Painful, I know, but possibly necessary if all else fails.