Data compression characteristics page, Control mode page fields, Data compression characteristics mode page fields – HP C737990900 User Manual
Page 82
82 Commands
Control Mode Page Fields:
Data Compression Characteristics Page
The Data Compression Characteristics Mode page is defined as follows:
Data Compression Characteristics Mode Page Fields:
Autoload Mode
0 If a cartridge is inserted, the drive pulls it in and threads the tape.
1 or
2
When a cartridge is inserted, the drive pulls it in but does not thread the tape. In this
position, only the Cartridge Memory is accessible.
All other values are invalid.
7
6
5
4
3
2
1
0
0
Page Code {0Fh}
1
Page Length {0Eh}
2
DCE [1]
DCC (1)
Reserved (0)
3
DDE (1)
RED (0)
Reserved (0)
4
(MSB)
Compression Algorithm (1)
7
(LSB)
8
(MSB)
Decompression Algorithm (1)
11
(LSB)
12
Reserved (0)
15
DCE
Data Compression Enable. This bit controls whether the drive uses compression when
writing. The value has no measning when reading, that is, if the tape contains
compressed data, decompression will occur regardless of the setting of this bit.
The bit is analogous to the Select Data Compression Algorithm field on the Device
).
0
1
Compression is disabled
Compression is enabled
DCC
Data Compression Capable
Read only. It will have the value of 1, indicating that compression is supported.