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Command Specifications
Table 4.12 MODE SELECT command (Group 0) parameter configuration (2/2)
Sub Page Descriptor
Bit
Byte
7 6 5 4 3 2 1 0
0 0 SPF Page Code
1 Sub Page Code
2
3
Page Length
4
n
~
~
~
~
~
~
Parameter Field
Page
Heade
r
a. Header
− Media type
X '00' (default type) must be specified in this field.
− Byte 2
Bits 7 and 4 of this field have meaning only in the header transferred to
the INIT by the MODE SENSE and MODE SENSE EXTENDED
commands. The values specified in these bits are disregarded in the
MODE SELECT and MODE SELECT EXTENDED commands. "0"
must always be specified by the INIT in the other bit positions.
− Block descriptor length
This field indicates the length (block count) of the "Block descriptor"
which follows the header (not including the length of the "Page
descriptor"). It is possible to define only 1 "Block descriptor" to the
HDD, and either X '00' or X '08' must be specified in this field. When X
'00' is specified in this field, it indicates that the "Block descriptor" is not
included in the parameter list transferred from the INIT and the "Page
descriptor" follows immediately after the "Header."
158 C141-C013