Reference Guide

Chapter 4 SCSI Commands
LOG SELECT Command (4Ch)
DLT-S4 Interface Reference Guide 63
General Purpose
Non-Volatile Log Page
(38h)
4
Log page 38h provides access to a 64 byte non-volatile buffer in the tape
drive for general purpose use. The log page contains one 64 byte
parameter with a Parameter Code setting of 0. The 64 bytes in the
Parameter Value field are stored in device non-volatile memory and are
returned when a
LOG SENSE command requests log page 38h.
Figure 25 General Purpose
Non-Volatile LOG SELECT
Page — Header Format
TMC (continued)
• The Default Threshold Values are the maximum values that each parameter can
attain.
• The Current Cumulative Values are the values computed since the last reset of the
tape drive by power-cycle,
TARGET RESET, SCSI RESET, or FCP TARGET RESET.
• The Default Cumulative Values are the values to which each parameter is
initialized at a reset condition. Default value is 0.
• By default, Current Threshold Values are set to Default Threshold Values.
• Note that all types of parameter values are changeable using
LOG SELECT.
LBIN List Binary. Must be set to 0.
LP List Parameter. Always set this bit to 0 to indicate that parameter codes are treated as
data counters.
Parameter Length Specifies the number of bytes in the parameter value.
Parameter Value Indicates the actual value of this log parameter.
Bit
Byte
7 6 5 4 3 2 1 0
0 Page Code (38h)
1 Reserved
2 – 3
(MSB)
Page Length
(LSB)
Field Description