Mode Data Format; Mode Parameter Header; Mode Parameter Header 6-Byte Command; Mode Parameter Header 10-Byte Command - IBM Ultrium Internal Tape Drive T200 Reference Manual

Mode Data Format

Mode data returned by a MODE SENSE command or sent with a MODE SELECT
command consists of a Mode Parameter Header, an optional Mode Block
Descriptor, and zero or more Mode Parameter Pages.

Mode Parameter Header

In a MODE SENSE command, the Mode Data Length indicates the total amount of
data available to be transferred. In a MODE SELECT command, this field is 0.
The Medium Type field is not used and should be set to 0.
The Write Protect flag indicates whether the currently loaded tape is write protected
in a MODE SENSE command. It is ignored in a MODE SELECT command.
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Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference
Table 30. Mode Data Format
7
0
:
3
4
:
11
12
:
n
Table 31. Mode Parameter Header 6-Byte Command
7 6
0
1
2 WP
3
Table 32. Mode Parameter Header 10-Byte Command
7 6
0
1
2
3 WP
4
5
6
7
6 5 4
Mode Parameter Header
Mode Block Descriptor
Mode Parameter Pages
5 4
Mode Data Length
Medium Type (0)
Buffered Mode
Block Descriptor Length
5 4
Mode Data Length
Medium Type (0)
Buffered Mode
Reserved
Reserved
Block Descriptor Length
3 2 1
3 2 1
Speed (0)
3 2 1
Speed (0)
0
0
0