Quantum LTO 4, Руководство пользователя

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SCSI Commands: 23BMODE SENSE Page 109
Field Bytes Bits Description
Allocation
Length 7-8 Specifies the number of bytes the host has allocated for returned
MODE SENSE data. The drive will not return more than this amount
of data. A value of 0 is a valid entry and indicates no data.
Reserved All reserved bits must be 0.
Control 9 See SCSI Command Control Byte Format on page 25.
3.11.2 MODE SENSE Data
The MODE SENSE data list, for both MODE SENSE(6) and MODE SENSE(10) is in
the following general format:
Mode Parameter Header The Mode Parameter Header is always returned.
Block Descriptor The Block Descriptor is returned if DBD is 0 in
the MODE SENSE CDB.
Mode Parameter Pages One or all Mode Parameter Pages may be
returned depending on the value of Page Code in
the MODE SENSE CDB.
3.11.3 Mode Parameter Header
3.11.3.1 MODE SENSE(6) Parameter Header
Byte
Bits
7 6 5 4 3 2 1 0
0 Mode Data Length
1 Medium Type
2 WP Buffered Mode Speed
3 Block Descriptor Length
3.11.3.2 MODE SENSE(6) Parameter Field Descriptions
Field Bytes Bits Description
Mode Data
Length
0 MODE SELECT: Always 0.
MODE SENSE: The number of bytes of data available.
Medium
Type 1 Identifies the type of media currently in the drive.
00h = Data Cartridge
01h = Cleaning Cartridge
80h = WORM Cartridge
WP 2 7 MODE SELECT: Ignored.
MODE SENSE: 0 = The cartridge is not write protected.
1 = the cartridge is write protected.
Buffered
Mode 2 4-6 0 = Un-buffered mode.
1 = Buffered mode (default).
Speed 2 0-3 This field indicates the speed at which the tape in the cartridge may
be used. Other speeds may be supported for manufacturing
purposes.
0 = variable speed (default)