SCSI Interface Overview
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SCSI Conformance
General features
The Viper 200 supports the following:
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Disconnect/reconnect, arbitration (required in SCSI-2 and SCSI-3)
•
LVD and single-ended drivers
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Both single and multi-initiator systems
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Fixed and variable block transfer lengths
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Hard reset
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Synchronous data transfers
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Parity implemented (switch option)
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Space blocks, filemarks and EOD
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Log Sense and Log Select for managing soft error reporting
Interface standards conformance
The Small Computer System Interface is described in standards including several
versions and a number of individual documents. The original Small Computer
System Interface Standard, X3.131-1986, is referred to herein as SCSI-1. SCSI-1
was revised resulting in the Small Computer System Interface – 2 (X3.131-1994),
referred to herein as SCSI-2. The set of SCSI-3 standards are collectively referred to
as SCSI-3. The applicable SCSI-3 standards are as follows:
SCSI-3 Architecture Model (SAM) X3.270: 1996
SCSI Architecture Model - 2 (SAM-2) in development
SCSI-3 Parallel Interface Amendment (SPI Amnd) X3.253/AM1: 1998
SCSI Parallel Interface - 2 (SPI-2) X3.302: 1999
SCSI Parallel Interface - 3 (SPI-3) in development
SCSI-3 Primary Commands (SPC) Status: X3.301: 1997
SCSI Primary Commands - 2 (SPC-2) in development
SCSI-3 Medium Changer Commands (SMC) NCITS.314: 1998
SCSI-3 Stream Commands (SSC) in development
The term SCSI is used wherever it is not necessary to distinguish between the
versions of SCSI.
LTO Conformance
Seagate LTO drives conform to the requirements of the
Generation 1 SCSI Common
Command Set Advisory Document
(AU1-SCSI) for Ultrium format devices.
