Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 131
Figure 71 SAS Phy Control
and Discover Mode Subpage —
Data Format
Table 80 SAS Phy Control and
Discover Mode Subpage —
Field Descriptions
Bit
7 6 5 4 3 2 1 0
Byte
0 PS (0) SPF (1) Page Code (19h)
1 SubPage Code (01h)
2 — 3
(MSB)
Page Length (34h)
(LSB)
4 Reserved
5 Reserved
Protocol Identifier (6h)
6 Reserved
7 Number of Phys (1)
8 — 55 SAS Phy Mode Descriptor (see figure 72)
Field Description
PS Parameters Savable. Must be to 0.
SPF SubPage Format. Must be to 1. Indicates that this page uses the sub_page mode
page format.
Page Code Identifies the type of
MODE SELECT page being transferred. A value of 19h
identifies this is as the Port Control Page.
SubPage Code Identifies the type of
MODE SELECT Subpage being transferred. A value of 01h
identifies this is as the SAS Phy Control and Discover Mode Subpage.