CompuServe Messages

John, I've got two different type of Conner CP-340's here. One set of drives were removed from Mac's, the other set (I've got 3 of each type) were removed from some AT&T mini's (they were used as paging drives for UNIX). Both are marked CP-340's, but the ones from the Mac only have 752 cylinders while the ones from the AT&T have 782 cylinders. The drive ID jumpers are exactly reversed on the Mac drives from what one would consider normal jumper settings. Jumper ON means binary 0 and jumper OFF means binary 1 on the Mac type drives. The AT&T's use jumper OFF as binary 0 and jumper ON as binary 1. The AT&T's will do a low level format, while the Mac type won't; although, both do return no errors on completion. The AT&T drives work exactly as detailed in the Conner technical manual I've got on them…the Mac drives obviously don't match the tech manual in the above areas. I did call Conner about the above…they told me that they made special runs of the CP-340 for the Mac. They used special ROMs on them. They also told me that Apple was the only one who required special ROMs…everyone else just got plain jane CP-340s. (Oh yea…those special runs were sold directly to Apple…not to dealers) Don