Seagate Medalist ST31082A, Product Manual

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Chapter 7 Command Set
Page 68 ST3636A/ST31082A/ST31276A
Data Structure Checksum
The Data Structure Checksum is the two's complement of the result of a simple
eight-bit addition of the first 511 bytes in the data structure.
Device Attribute Thresholds Data Structure
The following defines the 512 bytes that make up the Attribute Threshold
information. This data structure is accessed by the host in its entirety using the
Read Attribute Thresholds subcommand. All multi-byte fields shown in these
data structures follow the ATA-2 specification for byte ordering, namely that
the least significant byte occupies the lowest numbered byte address location in
the field.
The sequence of active Attribute Thresholds must appear in the same order as
their corresponding Attribute Values.
Table 7-3 - Device Attribute Thresholds Data Structure
Description Bytes Format Type
Data Structure Revision Number = 0005
H
2 binary Rd only
1st Device Attribute Threshold
12 see below Rd/Wrt
..
..
..
30th Device Attribute
12 see below Rd/Wrt
Reserved (00
H
)
18 Rd only
Vendor Specific 131 Rd only
Data Structure Checksum 1 Rd only
Total Bytes 512
Data Structure Revision Number
This value will be the same as the value used in the Device Attributes Values
Data Structure.