Reference Guide

Chapter 4 SCSI Commands
MODE SENSE (6) / (10) Command (1Ah / 5Ah)
DLT-S4 Interface Reference Guide 186
Figure 98 SAS — Port Control
MODE SENSE Page — Data
Format
DDIS Disable Discovery. Applies only if the drive is attached to an arbitrated loop. Always
set to 1. The drive does not require receipt of an Address or Port Discovery following
loop initialization.
DLM Disable Loop Master. Always set to 0. The drive participates in loop master arbitration
in the normal manner.
RHA Require Hard Address. Always set to 0. The drive attempts to acquire a soft address if it
cannot obtain a hard address.
ALWLI Allow Login Without Loop Initialization. Always set to 0. The drive only enters the
monitoring mode after it has gone through loop initialization.
DTIPE Disable Tape Initiated Port Enable. Always set to 0. The drive performs an LIP and
attempts to participate in the loop as soon as power is restored.
DTOLI Disable Tape Originated Loop Initialization. Always set to 0. The drive generates the
initializing LIP after it successfully enables a port into a loop.
RR_TOV Units Resource Recovery Timeout Units. Always set to 101b. The drive uses a ten second unit
of measure for RR_TOV in all cases.
RR_TOV Resource Recovery Timeout Value. Always set to 1Eh. The drive always uses an
RR_TOV value of 300 seconds.
Bit
Byte
7 6 5 4 3 2 1 0
0 PS (0) SPF (0) Page Code (19h)
1 Page Length (06h)
2 Reserved
Ready LED
Meaning
Protocol Identifier (6h)
3 Reserved
4 — 5
(MSB)
I_T Nexus Loss Time
(LSB)
6 — 7
(MSB)
Initiator Response Timeout
(LSB)
Field Description