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SCSI Commands
Quantum DLT 8000 Tape System
5-123
MODE SENSE (6) / (10) Command (1Ah / 5Ah) (continued)
Table 5–56 Data Compression Page — Field Descriptions
Field Name
Description
PS
Parameters Savable. Not supported; must be 0.
Page Length
The value in this field indicates the number of bytes in the Control
Mode Page being transferred. The value for this byte is 0Eh.
DCE
Data Compression Enable. The value returned for this bit depends on
the current WRITE density of the tape drive:
Value
Write Compression is…..
0
Disabled
1
Enabled
DCC
Data Compression Capable. The value returned for this bit indicates
whether this tape drive supports data compression
Value
Data Compression is…..
0
Disabled
1
Enabled
DDE
Data Decompression Enable. The value returned for this bit indicates
whether data decompression is enabled or not.
Value
Data Decompression is…..
0
Disabled
1
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.
Summary of Contents for DLTtape DLT 8000
Page 1: ...DLTTM 8000 Tape System Product Manual Nov 10 2003 81 60118 06...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued...
Page 6: ......
Page 26: ...Table of Contents xxiv Quantum DLT 8000 Tape System...
Page 36: ...About This Manual Quantum DLT 8000 Tape System xxxii...
Page 54: ...General Description and Specifications 1 18 Quantum DLT 8000 Tape System...
Page 102: ......
Page 372: ......
Page 376: ...Appendix A Definition of Vendor Unique Sense Data Information A 4 Quantum DLT 8000 Tape System...
Page 386: ...Appendix C Updating the Firmware C 6 Quantum DLT 8000 Tape System...
Page 396: ...Appendix E Visual Inspection Procedure for DLTtape Cartridges E 8 Quantum DLT 8000 Tape System...
Page 406: ...Appendix G DLT 7000 Emulation Feature G 8 Quantum DLT 8000 Tape System...
Page 407: ......