Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 114
Table 70 Control Mode MODE
SELECT Page — Field
Descriptions
Field Description
PS Parameters Savable. For
MODE SELECT, must be 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 SELECT page being transferred. A value of 0Ah
identifies this as the Control Mode Page.
Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1. The length is
returned in
MODE SENSE commands and must subsequently be set to the same
value when performing
MODE SELECT.
TST Task Set Type. The drive maintains separate task sets for each initiator. Must be
set to 1h.
D_Sense Descriptor Format Sense Data. Must be set to 0.
GLTSD Global Logging Target Save Disable. Must be set to 0.
RLEC Report Log Exception Condition. When set to 1, specifies that the drive reports
log exception conditions. When set to 0, specifies that the drive does not report
log exception conditions.
The RLEC bit works with the Read / Write Error
LOG SENSE page, specifically,
the TMC bit of the Read / Write Error LOG SENSE page (page 02h and 03h),
described in table 42
on page 71.
RLEC indicates whether the drive should return
CHECK CONDITION status with
Sense Key set to
UNIT ATTENTION when one of the READ and WRITE error
counters of the log pages reach a specified threshold. Modify the thresholds
using the
LOG SELECT command.
Queue Algorithm
Modifier
Must be set to 0.
QErr Queue Error. Must be set to 0.
DQue Disable Queuing. Must be set to 0.
TAS Task Aborted Status. Must be set to 0, indicating that tasks aborted by other
initiators do not return a status.
RAC Report a Check. Must be set to 0, indicating that the drive may return BUSY
status.