Reference Guide

Chapter 4 SCSI Commands

MODE SELECT (6) / (10) Command (15h / 55h)

DLT-S4 Interface Reference Guide 116

Data Compression Page

(0Fh)

The Data Compression Page specifies parameters for the control of data

compression. This page allows an initiator to turn the DLT-S4 tape drive’s

compressed format on and off independently of the position of the tape

medium.

Figure 62 Data Compression

MODE SELECT Page — Data

Format

Bit

7 6 5 4 3 2 1 0

Byte

0 PS (0) SPF (0) Page Code (0Fh)

1 Page Length (0Eh)

2 DCE DCC (1) Reserved

3 DDE (1) RED (0) Reserved

4 — 7

(MSB)

Compression Algorithm (10h)

(LSB)

8 — 11

(MSB)

Decompression Algorithm (10h)

(LSB)

12 — 15 Reserved