Nubus Jackhammer

[beachycove]

Having had my main 50-pin drive fail in my 840av, I have been doing some work on it today to get it back up and running. I installed in it, along with a 1GB boot drive, a SCSI Jackhammer card and a 9GB IBM 68-pin SCSI drive. The machine is running 8.1 for HFS+, and has FWB Toolkit v. 3 installed, along with the standard Jackhammer software. Termination etc. are all done right. It should work.

The trouble is that one necessary feature does not work: the machine will not shut down. If the Jackhammer is disabled on startup (CMD-OPT-J), or the card removed, the machine does shut down just fine. If the machine starts up normally, by contrast, both the Shut Down and Restart menu commands just make the machine stop dead in its tracks. I can hear the drive heads move (parking?), and the mouse pointer will still move on the screen, so that the machine is not frozen, but it is as if the final step of actually shutting off power cannot be reached. I can move the pointer, but I cannot click on anything, so in fact I have to press the power button on the front to make the machine turn off.

Any suggestions? I am lost, as in 20 years of using Macs this one is new to me.

 

[Strimkind]

Something comes to mind about extensions conflicting. I think I remember situations like that happening back in the days of system 7 and 8 where I'd install something new and everything would go wacko and I believe that is one example.

If you don't have it, pickup conflict manager, install and see if it can find anything that is conflicting wit the Jackhammer driver.

My other thought is do you have the latest driver for it? Maybe it was only meant for system 7?

 

[Microns]

Hi beachycove,

You've probably been through these but just in case:

Start-up with extensions off? Conflict here?

Have you done a cold reboot with the Jackhammer board removed from the SCSI bus then re-installed and tried again to do a shut-down? Don't know why but clearing the Nubus sometimes helps.

Reset the PRAM?

Rest the logic board?

Cheers...

 

[trag]

The 840AV was one of the first machines to have SCSI Manager 4.3 features built into the ROM.

Make sure that you do not have the SCSI Manager 4.3 extension enabled.

Launch the Control Panel for the JackHammer card and turn off the SCSI Manager 4.3 load. The JackHammer card is able to load SCSI Manager 4.3 from its ROM if the host machine lacks it.

There may be a special advanced screen you must get to to do this. It's been too long since I used the JackHammer.

I'm not certain if a SCSI Manager conflict would cause the problem you're having, but it seems like a likely place to start.

 

[Charlieman]

Try a different NuBus slot.

Tinker with the NuBus master settings on the Jackhammer.

 

[beachycove]

No joy, so I replaced the card and drive with a 7200rpm 50pin 4GB drive, which should be fast and big enough for my needs in this case.

Will try the Jackhammer in other hardware and see what transpires once I get the time.