Mode Parameter List - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

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 69. Mode parameter header (6)
The ten-byte command descriptor block header is defined below.
7.9.2.1.2 Mode parameter header (10)
7 6
BYTE 0 (MSB)
BYTE 1
BYTE 2
BYTE 3 WP
BYTE 4
BYTE 5
BYTE 6 (MSB)
BYTE 7
Figure 70. Mode parameter header (10)
Mode Data Length. When using the M O D E SENSE command, the mode data length field specifies the
length in bytes of the following data that is available to be transferred. The mode data length does not
include the length byte itself. When using the M O D E SELECT command, this field is reserved.
Medium Type field is always set to zero in the file (Default Medium Type).
WP. When used with the M O D E SELECT command, the Write Protect (WP) bit is reserved.
90
O E M Spec. of DDRS-3xxxx
5 4 3 2
Mode Data Length
Medium Type = 0
Reservbed = 0
Block Descriptor Length (= 0 or 8)
5 4 3 2
Mode Data Length
Medium Type = 0
Reserved = 0
Reserved = 0
Reserved = 0
Block Descriptor Length (= 0 or 8)
1 0
1 0
(LSB)
(LSB)