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Seagate Ultra 160 - User Manual

Seagate Ultra 160
186 pages
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Parallel SCSI Interface
Ultra 160
Ultra 320

Table of Contents

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Summary

Interface Requirements

How to Use This Interface Manual

Provides guidance on how to use the SCSI interface manual effectively.

General Interface Description

Describes the SCSI interface protocol and its implementation by Seagate.

Glossary of SCSI Terms

Defines key terms and acronyms used throughout the SCSI documentation.

Physical Interface Characteristics

Details the physical aspects of the SCSI interface, including cables and connectors.

Summary of SCSI Messages

Provides an alphabetical summary of SCSI messages with hex codes and page numbers.

SCSI Bus

SCSI Bus Signals Overview

Describes the standard signals used on the SCSI bus and their functions.

SCSI Bus Timing

Defines essential timing measurements for SCSI bus operations.

Data Transfer Modes

Explains the different modes for transferring data: Asynchronous, Synchronous, Paced.

DT Data Phase Parallel Transfers

Details data formatting and error protection in DT DATA phases.

Negotiation

Covers the process of negotiating transfer agreements between SCSI devices.

Logical Characteristics

SCSI Bus Phases Overview

Describes the sequence of phases that govern SCSI bus operations.

Selection Phase

Explains the process by which an initiator selects a target device.

Reselection Phase

Details how a target reconnects to an initiator to resume an operation.

Information Transfer Phases

Groups phases used for transferring data or control information.

Command Phase

Describes the phase where the target requests command information from the initiator.

Data Phase

Encompasses ST and DT phases for transferring data.

Message Phase

Covers MESSAGE IN and MESSAGE OUT phases for message exchange.

SCSI Bus Phase Sequences

Defines the prescribed order of phases on the SCSI bus.

Data Bus Protection

Details methods for protecting data transfer on the bus.

Message System Specification

General Message Protocols and Formats

Outlines general rules and formats for SCSI messages.

Message Formats

Defines the formats for one-byte, two-byte, and extended SCSI messages.

Message Categories

Classifies SCSI messages into categories like Link Control and Task Management.

Parallel Protocol Request

Negotiates synchronous data transfer, wide data transfer, and protocol options.

Synchronous Data Transfer Request

Negotiates synchronous data transfer agreements between devices.

Wide Data Transfer Request

Negotiates wide data transfer agreements for improved bandwidth.

Task Attribute Messages

Specifies identifiers (tags) for tasks to establish I_T_L_Q nexus.

Task Management Messages

Defines messages used to manage SCSI tasks, like aborting or resetting.

Miscellaneous SCSI Bus Characteristics

Attention Condition

Describes how an initiator signals a target that a message is ready.

Bus Reset Condition

Explains the condition and procedure for performing a bus reset.

Hard Reset

Details the process of releasing bus signals and entering BUS FREE phase.

Command Processing Considerations and Exception Conditions

Covers exception conditions and error handling in command processing.

SPI Information Units

Information Unit Transfer Logical Operations

Describes logical operations for transferring SPI information units.

SPI Information Units

Overview of different types of SPI information units.

SPI Command Information Unit

Transfers CDBs, task attributes, and task management requests.

SPI L_Q Information Unit

Contains nexus information, unit type, and length.

SPI Data Information Unit

Contains data for transfer.

SPI Data Stream Information Unit

Contains data for streaming transfers.

SPI Status Information Unit

Contains task completion status.

SCSI Commands

Command Implementation Requirements

Specifies requirements for implementing SCSI commands.

Command Descriptor Block (CDB)

Defines the structure for SCSI command requests.

Status

Describes the status byte returned after command termination.

Command Processing Considerations and Exception Conditions

Covers exception conditions and error handling in command processing.

Queued Tasks (formerly “queued I;O processes”)

Explains task queuing mechanisms for handling multiple commands.

Incorrect Initiator Connection

Describes issues arising from incorrect initiator connections.

Drive Features

S.M.A.R.T. System

Details the Self-Monitoring Analysis and Reporting Technology system.

Self-Test Operations

Covers default, short, and extended self-test procedures.

Self-Test Modes

Explains foreground and background modes for self-tests.

Alternate Error Detection for Asynchronous Information Phases

Describes enhanced error detection for Command, Message, and Status phases.

Protection Code

Details the protection code used for error detection.

Removal and Insertion of SCSI Devices (“Hot Plugging”)

Covers physical requirements for adding or removing SCSI devices.

SPI-3 to SCSI-2 Terminology Mapping

Provides a mapping between SPI-3 and SCSI-2 terminology.

Seagate Ultra 160 Specifications

General IconGeneral
BrandSeagate
ModelUltra 160
CategoryComputer Hardware
LanguageEnglish

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