User's Manual

DLT4000 SCSI Interface
-84 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
8 4. .6
The Data Compression Page specifies parameters for the control of data compression.
Bit
6 5 3 2 0
0 PS RSVD Page Code
1 Page Length
2 DCE DCC Reserved
Byte 3 DDE RED Reserved
4 (MSB)
7 Compression Algorithm (LSB)
8 (MSB)
11 Decompression Algorithm (LSB)
12 (MSB)
15 Reserved (LSB)
Figure 8-53 Data Compression Page (0Fh)
PS (Parameters Savable)
The Parameters Savable bit indicates if the MODE SENSE parameter data contained
in this page is savable. The DLT4000 drive does not support this feature. The value
returned for this bit is 0.
Page Code
The Page Code identifies the type of MODE SENSE data being transferred. The value
returned for this field is 0Fh (Data Compression Page).
Page Length
The Page Length indicates the number of Data Compression Page bytes that follow
this byte. The value returned for this byte is 0Eh.