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81-81276-01 Rev A01
July 2004
3-1
C
HAPTER
3
Chapter 3
SCSI Messages
This chapter provides a detailed description of the SCSI messages DLT1 tape drives support.
Specifically, it covers the following topics:
•
“SCSI Message System”
lists the specific format of SCSI messages.
•
“Supported SCSI Messages”
contains a description of each message supported by the tape drive.
3.1
SCSI Message System
SCSI messages allow communication between an initiator and a target for the purpose of physical path
management.
To support particular SCSI-1 initiators, the tape drive does not require an IDENTIFY message. If the
initiator sends a message after the SELECTION phase, it should be an IDENTIFY, ABORT, or BUS
DEVICE RESET message. If the tape drive receives any other message in this case, it goes directly to
BUS FREE phase.
Table 3-1
lists the supported SCSI messages. It also shows the message code and the direction of the
message flow (In = target-to-initiator, Out = initiator-to-target).
Table 3-1.
Supported SCSI Messages
Code
In/Out
Description
Section
06h
Out
ABORT
“ABORT (06h)” on page 3-2
0Ch
Out
BUS DEVICE RESET
“BUS DEVICE RESET (0Ch)” on page 3-3
00h
In
COMMAND COMPLETE
“COMMAND COMPLETE (00h)” on page 3-3
04h
In
DISCONNECT
“DISCONNECT (04h)” on page 3-3
01h
Both
EXTENDED MESSAGE
“EXTENDED MESSAGE (01h)” on page 3-4
80h–FFh
Both
IDENTIFY
“IDENTIFY (80h–FFh)” on page 3-5
Summary of Contents for DLTtape DLT1
Page 1: ...DLT1 VS80 SCSI Interface Guide...
Page 6: ...DLT1 VS80 SCSI Interface Guide vi July 2004 81 81276 01 Rev A01 Notes...
Page 12: ...Table of Contents xii July 2004 81 81276 01 Rev A01 Notes...
Page 16: ...List of Figures xiv July 2004 81 81276 01 Rev A01 Notes...
Page 20: ...List of Tables xviii July 2004 81 81276 01 Rev A01 Notes...
Page 24: ...Chapter 1 Introduction 1 4 July 2004 81 81276 01 Rev A01 Notes...
Page 32: ...Chapter 2 General SCSI Bus Operation 2 8 July 2004 81 81276 01 Rev A01 Notes...
Page 42: ...Chapter 3 SCSI Messages 3 10 July 2004 81 81276 01 Rev A01 Notes...
Page 181: ......