Table 98 Data Compression Mode Sense Page - Field Descriptions - Quantum DLT S4 Reference Manual

Bit
7
Byte
(MSB)
4 — 7
(MSB)
8 — 11
12 — 15
Table 98 Data Compression
MODE SENSE Page — Field
Descriptions
Field
PS
SPF
Page Code
Page Length
DCE
DCC
DDE
DLT-S4 Interface Reference Guide
6 5
Description
Parameters Savable. Always set to 0.
SubPage Format. Always set to 0. Indicates that this page uses the page_0 page
format.
Identifies the type of
identifies this as the Data Compression page.
Indicates the number of bytes in the page, excluding bytes 0 and 1.
Data Compression Enable. The value the drive returns depends on the current
density of the drive.
WRITE
Data Compression Capable. The value the drive returns indicates whether the
drive supports data compression. Always set to 1 indicating the drive is capable or
data compression.
Data Decompression Enable. The value the drive returns indicates whether data
decompression is enabled or not.
Always set to 1. When the drive reads compressed data from tape, it automatically
decompresses the data before sending it to the host.
MODE SENSE (6) / (10) Command (1Ah / 5Ah)
4
Compression Algorithm (10h)
Decompression Algorithm
Reserved
page being transferred. A value of 0Fh
MODE SENSE
Chapter 4 SCSI Commands
3 2 1 0
(LSB)
(LSB)
174