Amen fratello!

  

When the computers were being actively used and supported, the null-modem MiniDIN-8 was the only type of serial cable a user was likely to find in a computer store. Far from being some kind of exotic thing they had to solder themselves.

definetly a blue ice. no idea about their exact models and software compatibility.

They look almost identical but with big granddaughterboard

Possibly "related"?



See / read: https://www.provideocoalition.com/after-effects-performance-part-4-bottlenecks-and-busses/

I ordered G4 Sawtooth and i can't identify this expansion card that i will get with it

Update... tick tock tick tock 
This story is going to make me suffer  until the very end! :-)

The technician who was supposed to assemble the cable  is a nice  old  technician who has worked for 50 years on  radio and TV repairs and he said to me, "Oh Mario, I'm sorry, but  my hands and my eyesight  no longer allow me to do this kind of work. The  8 pins  to be soldered are too small, you need a steady hand.  Let's wait for the young guy who is just learning  the job to come back,  he's  away for a few days."
And I wait...

this makes sense, either you or your elves must have been doing that, as the hardware or OS9 will never do something like this.

however, it is generally not a bad idea to have a second system folder on the second disk, eventually a backup, but even better a juvenile, fresh install, so that you can easily boot from the second drive when something goes wrong with #1. (note that in order to boot OS9 from a drive, the boot partition may not exceed 192 gb.)

when you make backups from your system folder and do not want it to be bootable, use disc copy or toast to make image files, as this is much faster than using stuffit.

Of "some" possible interest here, in this matter...





                                               

This may be nothing at all, or it might provide some usable info regarding the J20 RAM slot problem.
(One of those ideas that has kept rattling around in my vacuous head.)

So far I know of five and possibly six individuals that have encountered this little J20 RAM slot bug-a-boo
AND maybe comparing the motherboard white labels of these machines might provide some other similarities.
And then again, maybe not.

See GaryN’s related comments here:
https://macos9lives.com/smforum/index.php?topic=7637.msg59356#msg59356

I’ve already requested such info / photos from @refinery and @blazer1878. That leaves @peeperpc
-- and an individual over on Reddit for me to contact and request this info / pic from.
I also have another MDD here, from which I also need to provide an image.

Again, this may all amount to absolutely nothing — but then again, maybe not?

Here’s the first such white label from @Mardeec’s MDD motherboard, below.



Seems rather odd to me that it looks like another, different label has been placed over the (original?) label
in the image above. Wonder if this might also be the case with the other J20 MDD here?

Anyway, everyone please humor me about this AND provide those requested label images here.

Thank ya!