Hello,
I recently purchased a 350 MHz B&W and it came with a SCSI card. However upon attempting to use the SCSI card with OS X I found that crashes were inevitable if a zip drive was attached to the SCSI bus; I am yet to test other devices.
I went looking for information on my SCSI card and I believe I have identified it (Adaptec AHA-7850).
I can't find anything at all with regards to firmware upgrades or drivers.
Adaptec seems to have purposefully purged any information or downloads regarding this card off its website. I don't know if the card was third party or supplied by Apple.
The card appears to work fine with OS 8.6 as it recognised and worked with the zip drive correctly.
Can anyone recommend a way for me to use my SCSI card in peace with OS X?

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mattabat

This was the information on the PCI card provided by System Profiler:

pci9004,7850:

Type: SCSI Bus Controller
Bus: PCI
Slot: J10
Vendor ID: 0x9004
Device ID: 0x5078
Subsystem Vendor ID: 0x9004
Subsystem ID: 0x7850
Revision ID: 0x0003

make sure you have all the devices terminated that need to be.

You're right in thinking that the SCSI card probably isn't compatible with OS X; seems that unless a firmware update for OS 8/9 compatible SCSI cards, they don't work very well under OS X.

I'd try placing the card in the top PCI slot (just below 66Mhz video card slot), and making sure your Zip drive is properly terminated.

JB

I checked for termination issues and it didn't make a difference.
I'll try shuffling about the PCI cards when I next open it, however it seems to work with 8.6 so I'm not holding my breath.
What happened to the drivers, firmware updates etc. for this and similar cards? Is there some website that still has them or were they all deleted when Adaptec did their purge of their website?

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mattabat

The AIC-2904 (which uses the 7850 chip) that you have does not work with OSX. You need the 2940 (any variant), which is natively supported by OSX.

B.