Quantum DAT 24 Drive Guía de usuario descargar pdf (Pagina 5)

Contents Page iii

Contents

Introduction 1

Overview......................................................................................................................1

Drive Models ...............................................................................................................1

About This Manual ......................................................................................................1

SCSI Interface Description 2

Overview......................................................................................................................2

ANSI SCSI Bus Standards ...................................................................................2

Cabling and Connectors .......................................................................................2

Signal Descriptions......................................................................................................3

Command Set Description ..........................................................................................4

ANSI X3.131, 199x Conformance Statement (SCSI-2) ..............................................5

General features ...................................................................................................5

Interface standards conformance.........................................................................5

Commands............................................................................................................6

* Autoloader only commands................................................................................6

Messages..............................................................................................................6

Vendor-unique commands....................................................................................6

SCSI Bus Protocol.......................................................................................................6

Waiting and Control Phases........................................................................................7

Arbitrating Systems...............................................................................................7

Selection and Reselection Phases..............................................................................9

Select With Attention ..........................................................................................10

Identify Message.................................................................................................10

Information Transfer Phases.....................................................................................11

Asynchronous Data Transfer..............................................................................11

Synchronous Data Transfer................................................................................13

Command Phase.......................................................................................................14

Data Phase................................................................................................................15

Data-In Phase.....................................................................................................15

Data-Out Phase ..................................................................................................15

Status Phase .............................................................................................................15

Message Phase.........................................................................................................15

Message-In Phase..............................................................................................15

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Quantum DAT 24 Drive Guía de usuario Pagina 5