I'm moving this discussion to Hacks. The beginning is in Trading Post, here:
Beginnging of Hacking
Following up on my last post in the previous thread:
I wasn't going to mess with it again in what little is left of the weekend, but I tried that last experiment. I connected a Flash-less 7722 (7722 from which I have desoldered the Flash chip) on the SCSI cable and got nothing in Apple System Profiler.
I have found in the past that a flashless 7722 still shows up as a device on the SCSI chain with a message on one of the lines similar to "BadROM16K" or something like that.
So, I tried the first SCSI cable again, and this time the flashless 7722 showed up as expected.
Then I hooked up the 7722 with socketed Flash programmed with 1.69 7726 firmware and connected the 400GB Seagate again. It showed up in ASP, but the drive did not mount on the desktop. It was already initialized earlier and should have a bunch of copied content on it.
I used Drive Setup (or whatever came with OS9) to initialize the drive and it locked up -- which doesn't surprise me, since it's failure to mount suggested issues.
After rebooting the 7722/7726 no longer appeared in ASP.
This strongly suggests to me that I've got intermittent flaws in both SCSI cables. Maybe a broken conductor that makes contact when the cable is wiggles one way and not the other way. Move the cables to switch 7722 units and things may stop working.
Beginnging of Hacking
Following up on my last post in the previous thread:
I wasn't going to mess with it again in what little is left of the weekend, but I tried that last experiment. I connected a Flash-less 7722 (7722 from which I have desoldered the Flash chip) on the SCSI cable and got nothing in Apple System Profiler.
I have found in the past that a flashless 7722 still shows up as a device on the SCSI chain with a message on one of the lines similar to "BadROM16K" or something like that.
So, I tried the first SCSI cable again, and this time the flashless 7722 showed up as expected.
Then I hooked up the 7722 with socketed Flash programmed with 1.69 7726 firmware and connected the 400GB Seagate again. It showed up in ASP, but the drive did not mount on the desktop. It was already initialized earlier and should have a bunch of copied content on it.
I used Drive Setup (or whatever came with OS9) to initialize the drive and it locked up -- which doesn't surprise me, since it's failure to mount suggested issues.
After rebooting the 7722/7726 no longer appeared in ASP.
This strongly suggests to me that I've got intermittent flaws in both SCSI cables. Maybe a broken conductor that makes contact when the cable is wiggles one way and not the other way. Move the cables to switch 7722 units and things may stop working.