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2
Speed
0
Block Descriptor
Only the values 0 and 8 are valid. Any value other than 0 or 8,
Length
reported. See the Parameter List check for details of the sense data generated.
0
8
Mode Block Descriptor
0
1
(MSB)
3
4
5
(MSB)
7
Density Code
This specifies the format of the media loaded in the drive. See
44h" on page 123
Block Length
This indicates the size of fixed blocks for fixed mode
the decision process on whether to report an illegal length record on reads.
00h
The drive will report
GOOD
as all the data or marks specified in the command have been transferred to the data
buffer and all buffered data from different initiators has been successfully written to
the tape. This is the maximum value.
The Speed field is not used and should be zero.
No block descriptor is being transferred.
The Mode Parameter header must be followed by the 8-byte block descriptor
described in the next section.
The format of the Mode Parameter block descriptor is as follows:
7
6
5
Mode Parameter Block Descriptor Fields:
for details.
The default value when the drive is in normal tape drive mode.
status for
and
WRITE
WRITE FILEMARKS
4
3
Density Code
Number of Blocks (0)
Reserved (0)
Block Length [0 or 800h]
"REPORT DENSITY SUPPORT
and
READ
WRITE
commands as soon
status is
CHECK CONDITION
2
1
0
(LSB)
(LSB)
commands. It is also used in
Commands
77
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