hes@ecsvax.UUCP (Henry Schaffer) (02/22/85)
We've had some interesting articles on the disk controllers, but I haven't seen the definitions of these acronyms. Please, somebody. --henry schaffer
wunder@wdl1.UUCP (02/25/85)
Computer to Controller Interfaces SASI Shugart Associates System Interface, an easy to implement interface to a tape or disc controller. Pronounced "sassy". SCSI Small Computer Systems Interface, ANSI version of SASI. Compatible, with some new, fancy commands added. Pronounced "scuzzy". 1.5 Mbytes/sec, new options allow 4 Mbytes/sec (syncronous transfers). IPI Intelligent Peripheral Interface. New standard with more smarts in the controller. Controller to Disc Interfaces ST-506 Shugart controller to disc interface. Very widely used. 5 Mbits/sec. ESDI Enhanced Small Disk Interface. New standard for faster disks. 15 Mbits/sec. SMD Storage Module Drive, the old favorite. Originally 10Mbits/sec (is that right?), new controllers handle 24 Mbits/sec.
devine@asgb.UUCP (Robert J. Devine) (02/27/85)
> We've had some interesting articles on the disk controllers, but > I haven't seen the definitions of these acronyms. Please, somebody. > --henry schaffer SCSI stands for "Small Computer System Interface". It is an enhancement of SASI (Shugart Associates Systems Interface). I don't believe that SCSI has been accepted as a standard by ANSI yet. The organizations behind SCSI are Shugart and NCR. Does anybody know of others? SASI was first done as a cpu to small disk interface -- suitable for a single user, small system. SCSI expanded SASI to include support for many different types of devices. These devices must be somewhat "smarter"; the cpu won't guide its every operation. A SCSI command is given to the device and the device does it, relinguishing control of the bus if the operation takes a long time. There have been a number of articles on SCSI recently. Check 'em out. Bob Devine