Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 125
Figure 66 Fibre Channel —
Logical Unit Control MODE
SELECT Page — Data Format
Table 75 Fibre Channel —
Logical Unit Control MODE
SELECT Page — Field
Descriptions
Bit
Byte
7 6 5 4 3 2 1 0
0 PS (0) SPF (0) Page Code (18h)
1 Page Length (06h)
2 Reserved Protocol Identifier (0h)
3 Reserved EPDC (0)
4 — 7 Reserved
Field Description
PS Parameters Savable. Must be set to 0.
SPF SubPage Format. Always set to 0. Indicates that this page uses the page_0 page
format.
Page Code Identifies the type of
MODE SELECT 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 0h indicates that this mode page applies to an FCP-2 port (see the Fibre
Channel Protocol – 2 (FCP–2) standard).
EPDC Enable Precise Delivery Checking. Indicates whether the drive uses the precise
delivery function defined by the Fibre Channel standard. Must be set to 0. The drive
ignores the contents of the Command Reference Number (CRN) in the FCP
command IU.
This value is not changeable using the
MODE SELECT command.