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SCSI Interface Product Manual, Rev. J
Table 106:
Mode Sense Parameter List
Bit
7
Byte
0,1
Sense Data Length [1]
2
0
3
WP [3]
4,5
Reserved
6,7
0
0
0
1
0
2
0
3
0
4
0
5
Block Length (MSB) [7]
6
Block Length [7]
7
Block Length (LSB) [7]
0-n
Mode Sense Page Headers and Their Parameters
Notes.
[1]
The Sense Data Length specifies the length in bytes of the following Mode Sense data that is available to
be transferred during the Data In phase. The Sense Data Length does not include itself.
[2]
The drive supports only 00h (default medium) in the Medium Type field.
[3]
A Write Protect (WP) bit of zero indicates the medium is write enabled. A WP bit of one indicates the
medium is write protected.
[4]
The Block Descriptor Length specifies the length in bytes of the Block Descriptor. It is equal to the number
of bytes in the Block Descriptor (8) and does not include the page headers and mode parameters, if any.
The drive sends one Block Descriptor.
Each Block Descriptor specifies the medium characteristics for all or part of a logical unit. Each Block
Descriptor contains a Density Code, a Number of Blocks, and a Block Length.
[5]
a. Drives that do not support capacity programming have only 00h (default density) in the Density Code
field.
b. Drives that support capacity programming may have a value in this field that states either the logical or
actual capacity of the drive.
[6]
a. For drives that do not support capacity programming, the Number of Blocks field specifies the number
of logical blocks of the medium that meets the Density Code and Block Length in the Block Descriptor.
6
5
0
0
0
0
DPO-FUA
Reserved
0
0
Block Descriptor Length (8 decimal) [4]
Block Descriptor Data
0
0
Density Code [5] [6]
0
0
Number of Blocks (MSB) [6]
0
0
Number of Blocks [6]
0
0
Number of Blocks (LSB) [6]
0
0
Parameter Information
4
3
0
0
Medium Type [2]
0
[8]
0
1
0
0
0
0
0
0
0
0
0
0
Reserved
2
1
0
0
0
0
Reserved
0
0
0
0
0
0
0
0
0
0
0
0
151
0
0
0
0
0
0
0
0
0
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