On Wednesday, October 8, 2003, at 08:46 PM, Mark Koan wrote:
I am posting this call for advice for a friend, so I have not seen the machine/situation first hand, but here goes: he hooked up an external Jaz drive to the SCSI port of a Color Classic with a 575 board in it. It did not work. He latter discovered that the Jaz drive was SCSI II or "fast SCSI".
Since then, the CC bombs out on boot with a "BUS Error" message. But when he swaps in the original CC motherboard, it is OK.
Is the 575 board somehow fried, or, as I suspect, connecting the Jaz drive kind of corrupted some sort of bus memory, since it failed to mount. Apparently, the Mystic recognised the drive as being on the bus, but when he inserted the jaz disk, it didn't show up on the desktop, and afterwards this problem of bus error emerged.
He has on my advice taken out the motherbaord, removed the pram, and let the whole thing sit for a couple days. If the problem persists, what to do? Is it really so dangerous to connect a SCSI II device to a color classic? I just assumed it would run at the lower speed.
I suspect that the Jaz is a red herring. Usual cause of bus errors with Mystics is the use of an incompatible System version, or a missing or wrong System Enabler.
Please find out a) what version of Mac OS, b) what system enabler, and then compare and contrast with the information at
http://dspace.dial.pipex.com/town/pipexdsl/o/aouq46/PowerCC/ CompendM.html
hth,
Stuart
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