Deskstar T7K500 Hard Disk Drive Specification
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12.42.2 Device Attribute Data Structure
The following defines the 512 bytes that make up the Attribute Value information. This data structure is accessed
by the host in its entirety using the S.M.A.R.T. Read Attribute Values subcommand. All multibyte fields shown in
these data structures are in byte ordering, that is, the least significant byte occupies the lowest numbered byte
address location in the field.
Table 140: Device Attribute Data Structure
12.42.2.1 Data Structure Revision Number
The Data Structure Revision Number identifies which version of this data structure is implemented by the device.
This revision number identifies both the Attribute Value and Attribute Threshold Data structures.
12.42.2.2 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.
Table 141: Individual Attribute Data Structure
Description Byte Offset Format Value
Data Structure Revision Number 2 00h binary 0010h
1st Device Attribute 12 02h (*1)
...
30th Device Attribute 12 15Eh (*1)
Off-line data collection status 1 16Ah (*1)
Self-test execution status 1 16Bh (*1)
Total time in seconds to complete off-line data
collection activity
2 16Ch (*1)
Current segment pointer 1 16Eh (*1)
Off-line data collection capability 1 16Fh (*1) 1Bh
S.M.A.R.T. capability 2 170h (*1) 0003h
S.M.A.R.T. device error logging capability 1 172h (*1) 01h
Self-test failure check point 1 173h (*1)
Short self-test completion time in minutes 1 174h (*1)
Extended self-test completion time in minutes 1 175h (*1)
Reserved 12 176h
Vendor specific 125 182h
Data structure checksum 1 1FFh (*1)
512
Description Byte Offset
Attribute ID Number (01h to FFh) 1 00h
Status Flags 2 01h
Attribute Value (valid values from 01h to FDh) 1 03h
Vendor Specific 8 04h
Total Bytes 12
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