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(3)
Page Descriptor
The "Page descriptor" is configured from a parameter field which follows a 2-byte page
header, and is divided into units called "Page" for each parameter's functional attributes. See
the description of the MODE SELECT command (item 3.1.5) concerning the configuration of
each page descriptor and their contents.
a. PS Bit
When this bit is "1," the parameter value defined in that "Page descriptor" can be saved on
the disk media, and when it is "0", it indicates that this is a parameter which cannot be
saved to the disk. It is possible to save all the "Page descriptors" supported by the IDD.
However, "1" is always indicated in this bit for all "Page descriptors" transferred by this
command.
b. Page Length
This field indicates the length of the parameter field (number of bytes) from byte 2,
excluding the page header of that "Page descriptor." The IDD always shows a value in this
field which is the same as the length defined in that "Page descriptor" regardless of the
type of parameter requested in the "PC (page control)" field of the CDB, and reports all the
parameter fields that "Page descriptor" in byte 2 and subsequent bytes.
c. Parameter Field
The parameter field in byte 2 and subsequent bytes, indicates parameter values of the type
(current values, variable values, default values or save values) requested in the "PC (page
control)" field of the CDB. See the description of the MODE SELECT command (item
3.1.5) concerning the definition of each parameter, "Default" values and "Variable" values.
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C141-E039-01EN
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