User's Guide

Commands: Mode Select (15h) Page 79
Control Mode Page Field Descriptions
The following table describes the fields in the Control Mode page.
Field
Name Bytes Bits Description
Page Code 0 0-5 The Page Code field must be set to 0Ah to select this page.
Page
Length
1 The Page Length field must be set to 6 (06h), which indicates that 6
parameter bytes follow the Page Length byte..
Report Log
Exception
Condition
2 0 A Report Log Exception Condition (RLEC) bit of 1 specifies that the
target reports log exception conditions.
Disable
Queuing
3 0 The Disable Queuing bit must be 1 to signify that tagged queuing is
disabled.
Data Compression Control Page (0Fh)
The Data Compression (DC) Control page specifies whether or not data is
compressed during a WRITE command and whether or not data is decompressed
during a READ command. It also provides for error reporting and selection of the
compression algorithm.
The following table illustrates the DC Control page for drives with data compression.
Byte
Bits
7 6 5 4 3 2 1 0
0 0 0 0 0 1 1 1 1
1 Page Length (0Eh)
2 DCE DCC 0 0 0 0 0 0
3 DDE RED 0 0 0 0 0
4 Compression Algorithm
5 Compression Algorithm
6 Compression Algorithm
7 Compression Algorithm
8 Decompression Algorithm
9 Decompression Algorithm
10 Decompression Algorithm
11 Decompression Algorithm
12 0 0 0 0 0 0 0 0
13 0 0 0 0 0 0 0 0
14 0 0 0 0 0 0 0 0
15 0 0 0 0 0 0 0 0