I may or may not be posting this in the right section, but thought I'd at least have a shot at getting an answer here. I'm trying to upgrade the drive in my Quadra 700 from the original 160mb to a 9gb 80 pin drive. I bought some of these adapters http://www.ebay.com/itm/SCA-80-PIN-...t=US_Drive_Cables_dapters&hash=item3cd7384ce0 (not the exact listing, but the ones I bought were identical). Initially, I swapped out the cable in the Q700 for one with two connectors, set the ID on the second drive to "1", wired the second hard drive in, and used a 1-2 Molex splitter to power both drives. The computer booted just fine, but didn't seem to recognize the second drive. As the 80 pin drive was pulled from a Linux computer, I assumed that it would need to be initialized before I could use it, but was not prompted to do so nor could I get any indication that it was there. The drive was definitely powered up, as I could feel/hear it spinning. In any case, I decided to go over to my Digital Audio G4, which has a SCSI card in it. The card in the DA has two separate 68-pin busses, as well as a 50 pin bus. I hooked the original Quadra drive to the 50 pin bus, and the 80 pin drive to one of 68 pin busses(via the adapter). These two drives were the only SCSI drives in the system. My plan was to format the new drive, then copy the entire contents of the old drive over to it. Upon booting(into OS X 10.4) I was given a warning that one of the drives was unreadable by the computer and needed to be initialized. The 160mb drive from the Quadra mounted fine and was 100% readable. I went into Disk Utility and attempted to format the 9gb drive as a "Mac OS Standard" with 1 partition. The drive would not initialize and mount when I did this, although I did get it to initialize as Mac OS Extended. In any case, I shut the computer off and thought on it for a little while. It occurred to me that I might need to make the partitions smaller for Mac OS Standard, so I booted the computer back up proceeded to try again. Upon booting again, I could not access the 9gb volume at all. It appeared and was identified correctly under the parallel SCSI section of system profiler, but did not appear in disk utility in any form or fashion. The 160mb volume was still 100% accessible. I tried all sort of different iterations of connecting the drive. I tried different ID numbers. I tried both 60 pin SCSI busses on the card. I tried it on the 50 pin SCSI bus(set to ID 1) with the drive out of the Quadra. I tried it on the 50 pin bus without the Quadra drive connected. I even transported the whole mess over to my Sawtooth G4(running both 10.4 and OS 9) but with the same results. In all cases, the drive appeared in System Profiler, but was not accessible. I'll also add that I have a whole bunch of the 80 pin drives(18 or 20, I think) and tried several different drives. I also tried several different adapters. Any idea as to what could be going on?