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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.