Quantum LTO 4, Руководство пользователя

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SCSI Commands: 22BMODE SELECT Page 81
3.10.3.3 MODE SELECT(10) Parameter Header
Byte Bits
7 6 5 4 3 2 1 0
0 (MSB)
1
Mode Data Length
(LSB)
2 MEDIUM TYPE
3 WP Buffered Mode Speed
4 Reserved
5 Reserved
6 (MSB)
7
Block Descriptor Length
(LSB)
3.10.3.4 MODE SELECT(10) Parameter Header Field Descriptions
Field Bytes Bits Description
Mode Data
Length 0-1 MODE SELECT: Always 0.
MODE SENSE: The number of bytes of data available.
MEDIUM
TYPE 1 00h = Data medium
01h = Cleaning medium
80h = WORM medium
WP 3 7 MODE SELECT: Ignored.
MODE SENSE: 0 = The cartridge is not write protected.
1 = the cartridge is write protected.
Buffered
Mode 3 4-6 0 = Un-buffered mode.
1 = Buffered mode (default).
Speed 3 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)
Block
Descriptor
Length 6-7 0 = No Block Descriptor follows.
8 = 8-byte Block Descriptor follows.
Reserved All reserved bits must be 0.
When Buffered Mode is 1, a WRITE command is completed when the data is
transferred to the internal buffer of the drive. When Buffered Mode is 0 a WRITE
command is not completed until all data has been transferred to tape.
3.10.4 MODE SELECT Block Descriptor
The following table presents the Parameter List block descriptor.
Byte Bits
7 6 5 4 3 2 1 0
0 Density Code
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 (MSB)
6
7
Block Length
(LSB)