I'm positive that the terms in the topic's subject deeply resonate in the memory of many of us, and I'm also pretty sure SCSI, as an acronym, in some time of its (definitely too long) life has spoken the line "I AM YOUR FATHER" to the FUD acronym. Anyway, I'm stuck in the following situation.
Tampering with my Power Mac 9600 in order to silence it, I've removed one of the two SCSI drives residing in the case, leaving just one active — which has always been the actual boot disk (the other was just for data). This is the device at the end of the SCSI chain, thus with SCSI Termination ON, and Termination Power ON. The problem is, the Power Mac doesn't boot anymore, and the display stays black. The drive spins but nothing happens. The same drive worked flawlessly before I removed the other drive.
I tried disabling Termination Power, leaving SCSI Termination ON: it does'nt work. Then I tried disabling SCSI Termination: of course it does'nt work. I'm still unsure if Termination Power has to be ON (although it was ON when the thing was working along with the other disk).
Then my attention went to some other jumpers: Unit Attention, and Parity. I seem to remember that in Power Macs, Unit Attention and Parity must be enabled: am I wrong? And by the way, what about Auto Spin and the other parameters?
In one question: what is the right configuration of a SCSI drive in a Power Mac?
A bunch of pics depicting the situation: the Power Mac 9600's SCSI bus (I removed the SCSI 1 device); the jumper setting of the SCSI 0 device (the Power Termination ON/OFF jumper is located in another area); the exotic jumpers of the SCSI 1 device — by the way, no termination jumper?