Reference Guide

Chapter 4 SCSI Commands
MODE SENSE (6) / (10) Command (1Ah / 5Ah)
DLT-S4 Interface Reference Guide 184
Port Control Page (19h) 4 This page contains the parameters that affect SCSI target port operation
options (For Parallel SCSI, see figure 96
; for Fibre Channel, see figure 97;
and for SAS, see figure 98
).
Figure 96 Parallel SCSI —
Port Control MODE SENSE
Page — Data Format
Table 104 Parallel SCSI —
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 (1h)
3 Reserved
4 — 5
(MSB)
Synchronous Transfer Timeout
(LSB)
6 — 7 Reserved
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 1h indicates that this mode page applies to an SPI-5 compliant port (see the
SCSI Parallel Interface – 5 (SPI–5) standard).
Synchronous
Transfer
Timeout
Indicates the amount of time, in 1 msec increments, that the drive waits for an ACK
during data transfers before performing an unexpected
BUS FREE operation.