It is a 68 pin drive. I did figure out from this article: http://vintagemacmuseum.com/formatting-old-mac-scsi-drives/ that I should change the SCSI ID to 0. I had it set to 1, which is supposed to be for external devices.
I also figured out that I was looking at the block of pins on the drive backwards, so what I thought was enabling and disabling the termination was actually just changing the SCSI ID from 0 to 1. I have an IBM 24P3688, manual here: http://ps-2.kev009.com/pccbbs/options/32p0743.pdf Also, I figured out that the "TERM POWER" pin is just enabling or disabling power for a terminator, not actually turning termination on or off.
Does anyone know of any 68-to-50 pin adapters with a termination switch? I'd prefer to not have a 25-pin terminator hanging off the back, as I intend to sell this at some point. Or, how hard would it be to solder the termination resistor(s) to the existing adapter? The adapter I have looks like this: http://www.amazon.com/SCSI-68-Pin-IDC-50-Pin-Adapter/dp/B003MMS5KA/
I also figured out that I was looking at the block of pins on the drive backwards, so what I thought was enabling and disabling the termination was actually just changing the SCSI ID from 0 to 1. I have an IBM 24P3688, manual here: http://ps-2.kev009.com/pccbbs/options/32p0743.pdf Also, I figured out that the "TERM POWER" pin is just enabling or disabling power for a terminator, not actually turning termination on or off.
Does anyone know of any 68-to-50 pin adapters with a termination switch? I'd prefer to not have a 25-pin terminator hanging off the back, as I intend to sell this at some point. Or, how hard would it be to solder the termination resistor(s) to the existing adapter? The adapter I have looks like this: http://www.amazon.com/SCSI-68-Pin-IDC-50-Pin-Adapter/dp/B003MMS5KA/