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5. SCSI Interface
5.1. Introduction
The Sony SDX-800V uses the SCSI interface to connect to the host system. The Small Computer System Interface
(SCSI) is an industry standard interface, approved by the American National Standards Institute (ANSI). It is
recommended that this document be used along with the ANSI standard document. The ANSI specification defines
the interface in general while this document describes the specific implementation for this unit. The SCSI
documents, listed in detail in clause 1.2, offer the information required to integrate this unit with SCSI-compatible
computer systems. This clause includes four sub-clauses:
• Introduction
• SCSI Bus Operation
• SCSI Messages
• SCSI Status
Note: The details of each SCSI Command are covered in Section 6.
The Introduction provides general, high-level information. For the hardware description and the installation
requirements, see Section 2.The SCSI protocol supported by the unit are covered in the Bus Operation, Message,
and Status clauses.
Overview of the SCSI Interface
5.1.1.
The SCSI implementation provides the unit with a standard set of features and functions. These include:
• Asynchronous and Synchronous communication modes
• Single-ended / Differential Configurations
• Full implementation of Mandatory commands
• Implementation of most sequential non-Mandatory commands
• Ultra160 SCSI Interface
i. Cyclic Redundancy Check (CRC)
ii. Double Transition Clocking (DT)
iii. Domain Validation
5.1.2.
Supported Messages
The following messages are supported: (alphabetic order)
*
Abort
*
Bus Device Reset
*
Command Complete
*
Disconnect
*
Extended Message - Synchronous Data Transfer Request
*
Extended Message - Wide Data Transfer Request
*
Extended Message - Parallel Protocol Request
*
Identify (w/ & w/o disconnect)
*
Ignore Wide Residue
*
Initiator Detected Error
*
Message Parity Error
*
Message Reject
*
No Operation
*
Restore Pointers
*
Save Data Pointer
For implementation details on these messages, see clause 5.3.
SONY AIT-3Ex drive SDX-800V series Ver.1.0
5.SCSI Interface
5-1
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