Messages
Quantum DLT 4000 Tape Drive
4-7
4.2.5 IDENTIFY Message (80h - FFh)
The IDENTIFY message is sent by either the initiator or the drive to establish or
re-establish the physical connection path between an initiator and target for a
particular logical unit, under the conditions listed below. Figure 4–2 shows the
format of the IDENTIFY message and Table 4–5 describes the data field
contents.
Bit
Byte
7
6
5
4
3
2
1
0
Identify
DiscPriv
LUNTAR
Reserved
LUNTRAN
Figure 4–2 IDENTIFY Message - Data Format
Table 4–5 IDENTIFY Message - Field Description
Field
Description
Identify
The Identify bit must be set to 1. This identifies the message as an IDENTIFY
message.
DiscPriv
Disconnect Privilege. The DiscPriv can be 0, provided that no other I/O process is
currently active in the drive. If not set to 1 and other I/O processes are currently
active in the drive, the drive returns BUSY status.
LUNTAR
The Logical Unit/Target Routine (LUNTAR) field must be set to zero. The drive
supports a single Logical Unit Number (LUN 0 ). A LUNTAR bit of one causes the
drive to send a MESSAGE REJECT message and switch to the BUS FREE phase.
Reserved
The Reserved bits must be zero. If a Reserved bit is non-zero, the drive returns a
MESSAGE REJECT message and switches to the BUS FREE phase.
LUNTRN
Logical Unit Number.
Содержание DLTtape DLT 4000
Страница 1: ...DLT 4000 Tape Drive Product Manual November 10 2003 81 60043 04 ...
Страница 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued ...
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Страница 24: ...About This Manual Quantum DLT 4000 Tape Drive xxiv ...
Страница 62: ...Hardware Implementation 2 28 Quantum DLT 4000 Tape Drive ...
Страница 100: ...Messages 4 12 Quantum DLT 4000 Tape Drive ...
Страница 264: ...SCSI Commands 5 164 Quantum DLT 4000 Tape Drive ...
Страница 274: ...Appendix B EEPROM Resident Bugcheck and Event Logs B 6 Quantum DLT 4000 Tape System ...
Страница 280: ...Appendix C Updating the Firmware C 6 Quantum DLT 4000 Tape Drive ...
Страница 298: ...Index Index 6 Quantum DLT4000 Tape Drive ...
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