Figure 107 Individual Attribute Data Structure - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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14.39.2.1 Data Structure Revision Number
The Data Structure Revision Number identifies which version of this data structure is implemented by the device.
This revision number will be set to 0005h. This revision number identifies both the Attribute Value and Attribute
Threshold Data structures.
14.39.2.2 Individual Attribute Data Structure
The following defines the 12 bytes that make up the information for each Attribute entry in the Device Attribute
Data Structure.
Description
Attribute ID Number (01h to FFh)
Status Flags
Bit 0 Pre-Failure/Advisory
Bit 1 On-line Collection
Bit 2-5 Reserved (may either 0 or 1)
Bit 6-15 Reserved (all 0)
Attribute Value (valid values from 01h to FEh)
00h invalid for attribute value – not to be used
01h minimum value
64h initial value for all attributes prior to any data collection
FDh maximum value
Feh value is not valid
FFh invalid for attribute value - not to be used
Reserved (may not be 0)
Reserved (may not be 0)
Reserved (00h)
Total Bytes

Figure 107 Individual Attribute Data Structure

Attribute ID Numbers: Any non-zero value in the Attribute ID Number indicates an active attribute. The device
supports following Attribute ID Numbers. Those marked with (*) indicate that corresponding Attribute Values can
be either collected on-line or off-line.
ID
Attribute Name
0
Indicates that this entry in the data structure is not used
1
Raw Read Error Rate (*)
2
Throughput Performance (*)
3
Spin Up Time
4
Start/Stop Count
5
Reallocated Sector Count
7
Seek Error Rate
8
Seek Time Performance (*)
Power-On Hours Count
9
Spin Retry Count
10
Device Power Cycle Count
12
191
G sense error rate
192
Power off retract count
193
Load/Unload cycle count
194
Device Temperature
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Bytes
Offset
Format
1
00h
binary
2
01h
bit flags
1
03h
binary
1
04h
binary
6
05h
binary
1
0Bh
binary
12
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