On Thu, Aug 20, 2015 at 10:23 PM, Jay Jaeger <[email protected]> wrote: > One of the things I learned in working with the SA-800 series is that > they can accept either unregulated -12V or regulated -5V on pin 4,
I've dealt with that issue on full height drives. The half-height drives, and some newer-model full-height, don't need a negative voltage, and leave that pin of the connector as a no-connect. I've verifed that pin 4 is specified as a no-connect in the documentation for the Mitsubishi M2896-63 that I attempted to use in place of the MPI drive, and also the Tandon TM848 series and the Qume 242. Apparently the MPI 9406 -22 variant has some other incompatibility with the standard Seagate DC power connector configuration, but I haven't taken the time to trace out the power wiring in the Quay 900 any more than was necessary.
