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Overview of SCSI  



The American National Standard for information systems -- Small Computer System Interface-2 (SCSI-2) specification defines mechanical, electrical, and functional requirements for connecting small computers to a wide variety of intelligent devices, such as rigid disks, flexible disks, magnetic tape devices, printers, optical disks, and scanners. It specifies standard electrical bus signals, timing, and protocol, as well as a standard packet interface for sending commands to devices on the SCSI bus.

Certain OpenVMS systems employ the SCSI bus as an I/O bus. For these systems, HP offers SCSI-compliant disk and tape drives, such as the RZ55 300 MB read/write disk, the RRD40 600 MB compact disk, and the TZK50 95 MB streaming tape drive. The operating system also allows devices including disk drives, tape drives, and scanners, supplied by sources other than HP, to be connected to the SCSI bus of such a system.

SCSI has been widely adopted by manufacturers for a variety of peripheral devices; however, because the ANSI SCSI standard is broad in scope, not all devices that implement its specifications can fully interrelate on the bus. HP fully supports SCSI-compliant equipment sold or supplied by HP. Proper operation of products not sold or supplied by HP cannot be assured.

For more information, refer to the following documents:

HP publishes two additional documents to help third-party vendors prepare SCSI peripherals and peripheral software for use with DIGITAL workstations.


 
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