Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 123
Logical Unit Control Page
(18h)
4
The Logical Unit Control Page contains the logical unit control
parameters for
READ and WRITE operations (For Parallel SCSI, see
figure 65
; for Fibre Channel, see figure 66; and for SAS, see figure 67).
Page Length Indicates the number 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.
Maximum Additional
Partitions
Must be set to 0.
Additional Partitions
Defined
Must be set to 0. Specifies the number of additional partitions defined for
the tape based on the settings of the SDP and IDP bits. The maximum
allowed is the value returned in the Maximum Additional Partitions field.
Only one partition is supported; therefore, this field must be set to 0.
FDP Fixed Data Partitions. Must be set to 0.
SDP Select Data Partitions. Must be set to 0.
IDP Initiator Defined Partitions. Must be set to 0.
PSUM Partition Size Unit of Measure. Must be set to 0.
POFM Partition on Format. Must be set to 0.
Clear Must be set to 0.
ADDP Additional Defined Data Partitions. Must be set to 0.
Medium Format
Recognition
Set to 01h, indicating that the drive supports Medium Format
Recognition.
Partition Units Must be set to 0.
Field Description