scsi-3
Transcription
-
- US Pronunciation
- US IPA
-
-
- US Pronunciation
- US IPA
-
Definition of scsi-3 word
- noun Technical meaning of scsi-3 (hardware) An ongoing standardisation effort to extend the capabilities of SCSI-2. SCSI-3's goals are more devices on a bus (up to 32); faster data transfer; greater distances between devices (longer cables); more device classes and command sets; structured documentation; and a structured protocol model. In SCSI-2, data transmission is parallel (8, 16 or 32 bit wide). This gets increasingly difficult with higher data rates and longer cables because of varying signal delays on different wires. Furthermore, wiring cost and drive power increases with wider data words and higher speed. This has triggered the move to serial interfacing in SCSI-3. By embedding clock information into a serial data stream signal delay problems are eliminated. Driving a single signal also consumes less driving power and reduces connector cost and size. To allow for backward compatibility and for added flexibility SCSI-3 allows the use of several different transport mechanisms, some serial and some parallel. The software protocol and command set is the same for each transport. This leads to a layered protocol definition similar to definitions found in networking. SCSI-3 is therefore in fact the sum of a number of separate standards which are defined by separate groups. These standards and groups are currently: In the meantime a group of manufacturers have proposed an extension of SCSI-2 called Ultra-SCSI which doubles the transfer speed of Fast-SCSI to give 20MByte/s on an 8 bit connection and 40MByte/s on a 16-bit connection. 1
Information block about the term
Parts of speech for Scsi-3
noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
See also
Matching words
Was this page helpful?
Thank you for your feedback! Tell your friends about this page
Tell us why?