Emax

I'm trying to format a 320 MB Apple/IBM 50 pin SCSI drive (IBM-H3342-S4).  My EMAX II seems to be detecting it... sort of... but I can't get it to select under the drive select menu.  I have played around with the jumpers to get the error message to change from "SCSI X not found" to "Not EMAX2 drive".  This is what leads me to believe it's being detected, but just needs to be formatted.  Do I have to do this prior to hooking it up to the EMAX?  Please help! This may just be a simple problem because I don't know what the heck I'm doing.

Thanks,
Everett