Mode Parameter List; Page Code Usage; Mode Parameter Header - IBM DCAS-32160 - Ultrastar 2.1 GB Hard Drive Specifications

1 1 Report saved value. The file returns the saved value for the page code specified.
Saved values are one of following :
the values saved as a result of M O D E SELECT command
identical to the default values
zero when the parameters are not supported
The Page Length byte value of each page returned by the file indicates up to which fields are sup-
ported on that page.
7.9.1.1.2 Page Code: This field specifies which page or pages to return.
Figure 67.
Page Code Description
01h 38h Return specific page.
3Fh Return all available pages.
Figure 67. Page Code Usage

7.9.2 Mode Parameter List

The mode parameter list contain a header, followed by zero or more block descriptors, followed by zero or
more variable-length pages.
7.9.2.1 HEADER
The six-byte command descriptor block header is defined below.

7.9.2.1.1 Mode parameter header (6)

7 6
BYTE 0
BYTE 1
BYTE 2 WP
BYTE 3
Figure 68. Mode parameter header (6)
The ten-byte command descriptor block header is defined below.
7.9.2.1.2 Mode parameter header (10)
5 4 3 2
Mode Data Length
Medium Type = 0
Reservbed = 0
Block Descriptor Length (= 0 or 8)
Page code usage is defined in
1 0
SCSI C O M M A N D SET
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