User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
Mode Sense (6/10) (1Ah / 5Ah)
218 Quantum DX-Series Software Interface Guide
Device Configuration Page (10h) 3
The tape drive supports the Device Configuration Page. The format for
the page is illustrated in the following figure.
DCC Data Compression Capable. The value returned
for this bit indicates whether this tape drive
supports data compression:
0 = Data Compression is disabled
1 = Data Compression is enabled
DDE Data Decompression Enable. The value returned
for this bit indicates whether data decompression
is enabled or not.
0 = Data Decompression is Disabled
1 = Data Decompression is Enabled
Note that when the tape drive reads compressed
data from tape, it automatically decompresses
the data before sending it to the initiator. The
value for this bit, therefore, is always 1.
RED Report Exception on Decompression. The tape
drive does not report exceptions on
decompression (boundaries between
compressed and decompressed data). The value
returned for RED is 00h.
Compression
Algorithm
The value for this field is 10h. This indicates the
Lempel-Ziv high efficiency data compression
algorithm.
Decompression
Algorithm
The value for this field is 10h. This indicates the
Lempel-Ziv high efficiency data decompression
algorithm. If EEPROM parameter
EnaRepDCcomp is set, a value of 0 is reported if
the last block read is not decompressed.
Field Name Description