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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-127

Port Control Page (19h)

This page contains the parameters that affect SCSI target port operation options.

Figure 4-71. Port Control MODE SENSE Page — Data Format

Table 4-71. Logical Unit Control MODE SENSE Page — Field Descriptions

Field Name Description

PS Parameters Savable. Not supported. Always set to 0.

SPF SubPage Format. Always set to 0. Indicates that the drive uses the page_0

page format.

Page Code Identifies the type of MODE SENSE page being transferred. A value of

18h identifies this as the Logical Unit Control page.

Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1. The

length is returned on MODE SENSE and must subsequently be set to the

same value when performing MODE SELECT.

Protocol

Identifier

A value of 1h indicates that this mode page applies to an SPI device. For

details, see SCSI Primary Commands – 3 (SPC–3).

Bit

Byte

7 6 5 4 3 2 1 0

0 PS SPF (0) Page Code (19h)

1 Page Length

2 Reserved Protocol Identifier (1h)

3 Reserved

4 - 5

(MSB)

Synchronous Transfer Timeout

(LSB)

6 - 7 Reserved

1 2 ... 164 165 166 167 168 169 170 171 172 173 174 ... 293 294

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