I'm with Motorollin in thinking it's not the Power Computing we all know (and love). The logo was a sketchy figure of a bloke throwing a lightning bolt or something.
It could be that a shortage of 23-pin connectors has led to the use of 25-pin jobbies. Then again, it could be that the drive really does use the parallel port. The pass through connector would allow the use of a second drive perhaps - or even a printer. I've still got a monochrome hand scanner (real Power Computing) that has such a through-port.
