Table 116 Device Attribute Thresholds Data Structure; Table 117 Individual Threshold Data Structure - Hitachi 7K320 - Travelstar Mobile Hard Drive Specifications

Device Attribute Thresholds Data Structure
14.40.3
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 S.M.A.R.T. Read Attribute Thresholds. All
multi-byte fields shown in these data structures follow the ATA/ATAPI-6 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 will appear in the same order as their corresponding
Attribute Values.
Description
Data Structure Revision Number
st
1 Attribute Threshold
...
...
th
30 Attribute Threshold
Reserved
Vendor specific
Data structure checksum
(*1) - See following definitions
(*2) - Value varied by actual operating condition
(*3) - Filled with 00h

Table 116 Device Attribute Thresholds Data Structure

14.40.3.1
This value is the same as the value used in the Device Attributes Values Data Structure.
14.40.3.2
The following defines the 12 bytes that make up the information for each Threshold entry in the
Device Attribute Thresholds Data Structure. Attribute entries in the Individual Threshold Data
Structure is in the same order and correspond to the entries in the Individual Attribute Data
Structure.
Description
Attribute ID Number (01h to FFh)
Attribute Threshold (for comparison with Attribute Values
from 00h to FFh)
00h - "always passing" threshold value to be
used for code test purposes
minimum value for normal operation
01h -
maximum value for normal operation
FDh -
invalid for threshold value
FEh -
"always failing" threshold value to be used
FFh -
for code test purposes
Reserved (00h)
Total Bytes

Table 117 Individual Threshold Data Structure

Data Structure Revision Number
Individual Thresholds Data Structure
Page 153 of 176
7K320 (SATA) OEM Specification
Bytes Offset
2
12
..
..
12 15Eh
18 16Ah
131 17Ch
1 1FFh
512
Bytes
1
1
10
12
Format
00h binary
02h (*1)
(*1)
Offset Format
00h binary
01h binary
02h binary
Value
0010h
(*2)
(*2)
(*3)
(*3)
(*2)