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101

SCSI-2 Drive Command Set

Mode Sense (Group 0) Command (1AH)

Chapter 22-54

Mode Sense (Group 0) Command (1AH)

This command is used to acquire optical disk, drive, and drive controller

parameters.

DBD A Disable Block Descriptors bit of 1 indicates that no

block descriptor is provided.

A DBD bit of 0 indicates that the block descriptor is

provided.

PC Page control defines the type of parameter values to be

returned as follows:

00 - Current Values

01 - Changeable Values

10 - Default Values

11 - Saved Values

Page Code Page code values are the same as for the Mode Select

command. If 00H or 3FH is specified, all pages are

returned.

Table 2-47 Mode Sense (Group 0) Command CDB

Byte 7 6 5 4 3 2 1 0

0 Operation Code (1AH)

1 Logical Unit Number

(0)

Rsvd

(0)

DBD Rsvd (0)

2 PC Page Code (Table 2-50 on page 2-56)

3 Reserved (0)

4 Allocation Length

5 Reserved (0) Flag Link

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 377 378

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