Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rutgers!aramis.rutgers.edu!athos.rutgers.edu!marsella From: marsella@athos.rutgers.edu (Stacy Marsella) Newsgroups: comp.periphs.scsi Subject: Adaptec SCSI-ST506 Message-ID: Date: 9 Jul 90 23:56:53 GMT Organization: Rutgers Univ., New Brunswick, N.J. Lines: 24 Does anyone know the differences between the various Adaptec SCSI to ST506 boards? The Adaptecs come in various models, such as the 4000(a), 4010 (advertised as a mac version of the 4000a), and the 4070 (a rll version). And I just saw an ad mention an ADAPTEC model 5500 scsi to st506. Precisely how do these models differ? For instance, I vaguely remember reading that there was something special about Macs vis-a-vis the scsi standard, but I have no idea how/why this might relate to there being a special adaptec board. My question stems from a desire to use one of these scsi-st506 boards to hook a Maxtor 1140 (918 cyls, 15 heads, 140 meg) to a NeXT (not a Mac - but any Mac/SCSI peculiarities may well be pertinent). I have tried an adaptec 4000(a?) with no success so far - the system never recognizes the adaptec. In effect, it never reports seeing the adaptec on the bus during the boot. The adaptec is set for scsi address 0 which should not interfere with the NeXT. Indeed, the Next side seems fine - it will recognize a scsi tape controller (an emulex if memory serves). Any suggestions? S. Marsella marsella@athos.rutgers.edu