OK, problems continue with SCSI.
I installed a Jackhammer NuBus card in the Quadra 950, along with a 68pin cable (I think this is a U320 cable), terminator on the end, and a 1GB SCA HD containing a 80 to 68/50 pin adapter. When I boot up the computer, it takes forever to boot up. First there is ~5min long wait before it even starts the boot up process (just mouse pointer on the screen) and then the splash screen comes up but before any extensions start to load it waits for ~15-20min (these are real times, not feeling). Once it boots up, the drive doesn't mount and the Jackhammer control panel doesn't see it but it sees the card. It doesn't matter whether the drive is hooked up or not, the wait is still this long. If I remove the cable from the card, it boots up fine.
So my question is, does it matter what kind of cable it is? I thought that as long as it was 68pins, it would be OK.