This is true, something I've noticed quite a bit these past days .PB SCSI hard drives are a little tricky to find.Couldn't you simply buy a new Hard Disk? 80 MB can't be that expensive these days.
I know now the problems definitely the HD too: the machine now boots from the OS 7.5 install disk, except the option to "switch disk" to the HDD is always greyed out.
I'm thinking the obvious problem is the broken pin(s) on my current disk. However, I've been searching and I'm not quite sure how many pins are supposed to be intact on the SCSI connector. Does anyone know how many pins the drive should have? I know its a 40-pin drive, but I'm not sure if some are missing because they are redundant. It would be really helpful to have a diagram or something to tell me what it's supposed to look like. :-/