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SCSI Cables

SCSI External Adapter Centronics-M to 25D-F
Centronics-M to 25D-F
ex.VAT £1.24 £1.49

SCSI External Adapter
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SCSI External Cable 50HD to Centronics 1m
50HD to Centronics
ex.VAT £1.24 £1.49

SCSI External Cable
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SCSI External Cable 50HD to Centronics 50cm
50HD to Centronics
ex.VAT £1.24 £1.49

SCSI External Cable
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SCSI External Cable 68HD to 25D 2m
68HD to 25D
ex.VAT £1.24 £1.49

SCSI External Cable
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SCSI External Cable 68HD to 50HD 1m
68HD to 50HD
ex.VAT £1.24 £1.49

SCSI External Cable
 alternative
SCSI External Cable 68HD to Centronics 50cm
68HD to Centronics
ex.VAT £1.24 £1.49

SCSI External Cable
 alternative
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SCSI Cables

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SCSI (Small Computer System Interface) is a set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, and electrical and optical interfaces. SCSI is most commonly used for hard disks and tape drives, but it can connect a wide range of other devices, including scanners and CD drives. The SCSI standard defines command sets for specific peripheral device types; the presence of "unknown" as one of these types means that in theory it can be used as an interface to almost any device, but the standard is highly pragmatic and addressed toward commercial requirements.

SCSI is an intelligent interface: it hides the complexity of physical format. Every device attaches to the SCSI bus in a similar manner
SCSI is a peripheral interface: up to 8 or 16 devices can be attached to a single bus. There can be any number of hosts and peripheral devices but there should be at least one host.
SCSI is a buffered interface: it uses hand shake signals between devices, it can transfer only real data and does no error checking and correction. All those are done in a buffer.
SCSI is a peer to peer interface: communication can be from host to host, host to a peripheral device, peripheral device to a peripheral device
SCSI is most commonly pronounced "scuzzy".

iSCSI
iSCSI preserves the basic SCSI paradigm, especially the command set, almost unchanged. iSCSI advocates project the iSCSI standard, an embedding of SCSI-3 over TCP/IP, as displacing Fibre Channel in the long run, arguing that Ethernet data rates are currently increasing faster than data rates for Fibre Channel and similar disk-attachment technologies. iSCSI could thus address both the low-end and high-end markets with a single commodity-based technology.

Serial SCSI
Four recent versions of SCSI—SSA, FC-AL, FireWire, and Serial Attached SCSI (SAS)—break from the traditional parallel SCSI standards and perform data transfer via serial communications. Although much of the documentation of SCSI talks about the parallel interface, most contemporary development effort is on serial SCSI. Serial SCSI has a number of advantages over parallel SCSI: faster data rates, hot swapping (some but not all parallel SCSI interfaces support it), and improved fault isolation. The primary reason for the shift to serial interfaces is the clock skew issue of high speed parallel interfaces, which makes the faster variants of parallel SCSI susceptible to problems caused by cabling and termination. Serial SCSI devices are more expensive than the equivalent parallel SCSI devices, but this is likely to change soon[citation needed].

This article is licensed under the GNU Free Documentation License. It uses material from the following Wiki article(s) :
* SCSI

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