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5-72 Maxtor Atlas 10K V
Table 5-101 Mode Parameter Header & Block Descriptor-Field Descriptions
Data Field Description
Mode Data Length Length of the returned data.
Medium Type Always zero (0).
Device Specific
Parameter
Bit 7 - This bit is set if the drive is write protected.
Bit 4 - This bit is always set to indicate that the drive supports cache
memory.
Block Descriptor Length
The value = 0 if no Block Descriptor is supplied; the length is 8 if a block descriptor is
supplied.
Density Code Ignored by the drive.
Number of Blocks
The value in this field specifies the number of logical blocks on the unit that are affected
by the current MODE SELECT command. When this field = 0, the MODE SELECT
parameters are put into effect for all logical blocks on the unit. The maximum value al-
lowed is the total number of initiator-addressable logical blocks for the value specified
in the Block Length field. A value that is less than the maximum value will decrease the
number of initiator-accessible logical blocks to the amount specified.
Block Length The value in this field specifies the length, in bytes, of each logical block.