Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 129
Figure 70 SAS — Port Control
MODE SELECT Page — Data
Format
DTFD Disable Tape Drive Fabric Discovery. Must be set to 0. The drive always recognizes a
fabric loop port if it is present.
PLPB Prevent Loop Port Bypass. Must be set to 1. The loop port is always participating and
ignores all LPE and LPB primitives.
DDIS Disable Discovery. Applies only if the drive is attached to an arbitrated loop. Must be
set to 1. The drive does not require receipt of an Address or Port Discovery following
loop initialization.
DLM Disable Loop Master. Must be set to 0. The drive participates in loop master
arbitration in the normal manner.
RHA Require Hard Address. Must be set to 0. The drive attempts to acquire a soft address
if it cannot obtain a hard address.
ALWLI Allow Login Without Loop Initialization. Must be set to 0. The drive only enters the
monitoring mode after it has gone through loop initialization.
DTIPE Disable Tape Initiated Port Enable. Must be 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. Must be 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. Must be set to 101b. The drive uses a ten second
unit of measure for RR_TOV in all cases.
RR_TOV Resource Recovery Timeout Value. Must be 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
Field Description