Akai S1000 / S1100 samplers

I got an external (internal mounted in case) 50 pin SCSI Jaz drive 
off of ebay for my S1000. I had to send the first drive back because 
it was a total piece of crap, it was mounted in the case wrong and it 
grinded like a chainsaw when it powered up. For the cost of return 
shipping the guy put a "new one" in the case and sent it back. It 
still grinds but doesn't sound as bad, he also included another 
cartridge. When I chain it up to my S1000PB with a newly formatted 
disc it doesn't read it. I have a standard sampling S1000 without a 
SCSI card. I don't have any dated 50 pin SCSI computers to test the 
drive on. Should I swap the SCSI card into my S1000 and try to format 
and save the JAz disc or would this be a bad choice? I really don't 
want to damage the only SCSI card I have, since I had so much trouble 
just to get the CD Rom to finally work with the PB. Right now my 
pathetic Jaz drive is just a $30 paperweight.