Quantum DLT-S4 Guide de l'utilisateur télécharger pdf (Page 88)

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101

Chapter 4 SCSI Commands

LOAD UNLOAD Command (1Bh)

DLT-S4 Interface Reference Guide 54

LOAD UNLOAD Command (1Bh) 4

The LOAD UNLOAD command instructs the DLT-S4 tape drive to load or

unload the tape inside the data cartridge. If no data cartridge is in the

drive, the

LOAD UNLOAD command returns a CHECK CONDITION status

with the Sense Key set to

NOT READY. Likewise, if the drive receives a

LOAD UNLOAD command with the Immediate bit set and then it receives

another command that requires tape motion or if it receives a

TEST UNIT

READY

command, the drive returns a CHECK CONDITION status with the

Sense Key set to

NOT READY.

Before executing the

LOAD UNLOAD command, the drive writes any

cached write data to the tape.

Figure 20 LOAD UNLOAD

Command Descriptor Block

—

Data Format

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (1Bh)

1 Reserved Immed

2 — 3 Reserved

4 Reserved Hold EOT ReTen Load

5 Control

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 385 386

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