Recent content by epoxy2600

OK, so I think I get it now: The RAM disk will be wiped out upon cold boot because of the RAM test, so one cannot have a copy of the System in the RAM disk for practical everyday use. However, if I install the System into RAM disk and then *re-start* (warm boot) then the RAM contents are not...

Elfin: you raise a good point. That would be a real Catch-22 if that's true. However, I'm pretty sure you can boot a Quadra from a RAM disk. The instructions that came with the Jackhammer NuBus card explicitly describe setting up a bootable RAM disk to facilitate setting up a sole HD connected...

Thanks Eagle! I will download your floppy and have a go. That's much appreciated! And yes, I have a brand-new PRAM battery I plan to install before proceeding. I have never set up a RAM disk to boot from. Do you guys think I should do a full System 7.5 install or keep it minimal for my...

Good points, thanks just.in.time. I suppose it is possible tugging on the external SCSI connector may have caused a loose connection or something becoming physically displaced. I'll open the CC up and have a look. In the end it's not a big deal since I intend to replace the internal HD with a CF...

Thinking about it more, I guess I shouldn't have implied I believe the external HD connection actually *damaged* the internal drive as my subject line suggests, but rather something about having the external drive hooked up and running finally pushed the aging and "on the verge of failing"...

I've got a Quadra 840av with broken SCSI bus - neither internal nor external SCSI devices can mount properly. I want to install a NUBUS Jackhammer SCSI card that I hope to use for connecting drives. If I understand correctly, in order to configure the Quadra so that it can boot from an HD...

I had my Color Classic up and running fine for several weeks now, never a problem booting from the internal HD. Yesterday I hooked up an external known-good HD to the rear SCSI port and was able to boot the Mac and see/access both drives on the System 7.1 desktop. Great! But once I powered down...

Thank you for the responses. Looks like I'm on the hunt for a Nubus Jackhammer then! My understanding is the Jackhammer is faster than the SEIV anyhow. Anyone happen to have one for sale?

I believe the built-in SCSI buses (both internal and external) of my Quadra 840av are not working. Someone suggested that I could install a Nubus SCSI card (such as ATTO or FWB Jackhammer) as an alternative. That sure sounds attractive! But will HDs hooked up through one of these cards be seen...

Thanks for the suggestions, @bobo68: I installed a brand new PRAM battery (verified with meter it is putting out 3.6v). Also zapped PRAM at startup w/ comand-option-P-R several times and performed the mob reset procedure as you mentioned. No change. @Hotdog: Yes, you are right the long black...

I should add that when I first got the 840av the board showed signs of leaky caps and the computer wouldn't even chime on startup. So I had it recapped, and now it lives but with the SCSI issues. I also installed brand new 128 MB of RAM thinking (hoping) that bad RAM was responsible. Any...

Hi all,  I'm trying to restore a Quadra 840av and am having SCSI issues. My fear is that the SCSI controller on the motherboard is fried and this computer cannot recognize any SCSI devices hooked to it internally or externally. Here's the situation: On power up, it chimes but the screen...