Quantum DLT-S4 Guide de l'utilisateur télécharger pdf (Page 134)

100

101

Chapter 4 SCSI Commands

MODE SELECT (6) / (10) Command (15h / 55h)

DLT-S4 Interface Reference Guide 100

Figure 50 MODE SELECT (10)

Command Descriptor Block —

Data Format

Table 63 MODE SELECT (6)/

(10) Command Descriptor

Block — Field Descriptions

Figure 51 shows the format of the Mode Parameter List that the host

passes to the drive.

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (55h)

1 Reserved PF Reserved SP (0)

2 — 6 Reserved

7 — 8

(MSB)

Parameter List Length

(LSB)

9 Control

Note: The drive returns a CHECK CONDITION status with Sense Key

set to

ILLEGAL REQUEST if it receives an unsupported page

code or a page field with values not supported or not

changeable. In such cases, the drive does not change any

parameters as a result of a command.

Field Description

PF Page Format. Indicates that the data the host sent after the

MODE SELECT header and block descriptors complies with

the definition of pages in the SCSI-3 specification. If the Page

Format bit is set to 0, only a Mode Parameter Header and

Mode Parameter Block Descriptor may be included in the

mode parameter data.

SP Save Parameters. Must be set to 0.

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 385 386

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