Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!husc6!linus!philabs!steinmetz!davidsen From: davidsen@steinmetz.steinmetz.UUCP (William E. Davidsen Jr) Newsgroups: comp.sys.att Subject: Re: info on 7300 disk drives Message-ID: <6026@steinmetz.steinmetz.UUCP> Date: Wed, 20-May-87 13:47:18 EDT Article-I.D.: steinmet.6026 Posted: Wed May 20 13:47:18 1987 Date-Received: Sat, 23-May-87 09:40:26 EDT References: <6485@mhuxu.UUCP| <1390@hou2d.UUCP| <506@unisec.usi.com| <166@gizzmo.UUCP| <1750@ihlpe.ATT.COM| <856@kodak.UUCP| Reply-To: davidsen@kbsvax.steinmetz.UUCP (William E. Davidsen Jr) Organization: General Electric CRD, Schenectady, NY Lines: 30 Keywords: 7300 drives In article <856@kodak.UUCP| hill@kodak.UUCP (mark hilliard) writes: |In article <1750@ihlpe.ATT.COM| psfales@ihlpe.ATT.COM (Peter Fales) writes: || WRONG!! Sorry to flame, but I would hate to see anyone go out and purchase ||a SCSI drive. The 7300 uses ST506 drives like those used on the 6300 and | |WRONG again, the SASI and SCSI are acronyms that the drive companies give to |their standard ST506 interfaces! If a drive is a SASI it IS a ST506. Please |check out your facts before making generalized statements about winchester |drives. I have been installing SASI and SCSI drives in the 7300 and 3B1 for |over a year now. | | |SASI stands for Sugart Associates Standard Interface which the other |companies didnt like so they renamed it to SCSI which means Small Computer |Standard Interface. They are both the same and both ST506, which some other |companies call ST412. Son-of-a-gun! Still another WRONG. ST506 and ST412 are NOT the same. A 412 drive will run on 506 but not the other way 'round. ST412 is the interface in the AT and its brethern. The difference is that 506 requires you to do stepping as "staep-wait-step-wait" while 412 uses "buffered seeks" (their term, not mine) and will accept "seek-seek-seek-wait" commands. I don't know of anyone who still makes ST506 drives, but that doesn't mean they don't. -- bill davidsen sixhub \ ARPA: wedu@ge-crd.arpa ihnp4!seismo!rochester!steinmetz -> crdos1!davidsen chinet / "Stupidity, like virtue, is its own reward"