Reference Guide

Chapter 4 SCSI Commands
MODE SENSE (6) / (10) Command (1Ah / 5Ah)
DLT-S4 Interface Reference Guide 185
Figure 97 Fibre Channel —
Port Control MODE SENSE
Page — Data Format
Table 105 Fibre Channel —
Port Control MODE SENSE
Page — Field Descriptions
Bit
Byte
7 6 5 4 3 2 1 0
0 PS (0) SPF (0) Page Code (19h)
1 Page Length
2 Reserved Protocol Identifier (0h)
3 DTFD PLPB DDIS DLM RHA ALWLI DTIPE DTOLI
4 — 5 Reserved
6 Reserved RR_TOV Units
7 Resource Recovery Time-out (RR_TOV)
Field Description
PS Parameters Savable. Always 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 SENSE page being transferred. A value of 19h identifies this
as the Port Control page.
Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1.
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).
DTFD Disable Tape Drive Fabric Discovery. Always set to 0. The drive always recognizes a
fabric loop port if it is present.
PLPB Prevent Loop Port Bypass. Always set to 1. The loop port is always participating and
ignores all LPE and LPB primitives.