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MODE SENSE (6) / (10) Command (1Ah / 5Ah) SDLT 600 SCSI Interface Guide

4-108 January 2005 81-81200-02 REV A01

The 10-byte MODE SENSE command is required to request the vendor-specific EEPROM parameter

page due to the large amount of data that parameter page contains. MODE SENSE (10) can be used to

retrieve the other pages as well. Note that MODE SENSE (10) returns descriptor data in a different

format than MODE SENSE (6).

Figure 4-59. MODE SENSE (10) Command Descriptor Block — Data Format

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (5Ah)

1 Reserved LLBAA DBD Reserved

2 PC Page Code

3 SubPage Code

4 – 6 Reserved

7 – 8

(MSB)

Allocation Length

(LSB)

9 Control

Table 4-60. MODE SENSE Command Descriptor Block — Field Descriptions

Field Name Description

LLBAA Long LBA Accepted. Ignored. The drive does not support long LBA

format mode parameters.

DBD Disable Block Descriptors. When set to 0, the drive returns the block

descriptor data. When set to 1, the drive does not return block descriptor

information.

PC Page Control. Indicates the type of page parameter values the drive

returns to the host:

PC Type of Parameter Values

00b Report Current Values

01b Report Changeable Values

10b Report Default Values

11b Report Saved Values

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