Table 139: Device Attribute Data Structure; Table 140: Individual Attribute Data Structure - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

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
Description
Data Structure Revision Number
1st Device Attribute
...
30th Device Attribute
Off-line data collection status
Self-test execution status
Total time in seconds to complete off-line data
collection activity
Current segment pointer
Off-line data collection capability
S.M.A.R.T. capability
S.M.A.R.T. device error logging capability
Self-test failure check point
Short self-test completion time in minutes
Extended self-test completion time in minutes
Reserved
Vendor specific
Data structure checksum
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
Attribute ID Number (01h to FFh)
Status Flags
Attribute Value (valid values from 01h to FDh)
Vendor Specific
Total Bytes
Deskstar T7K500 Hard Disk Drive Specification
230
Byte Offset Format
2 00h binary
12 02h
12 15Eh
1 16Ah
1 16Bh
2 16Ch
1 16Eh
1 16Fh
2 170h
1 172h
1 173h
1 174h
1 175h
12 176h
125 182h
1 1FFh
512
Byte Offset
1 00h
2 01h
1 03h
8 04h
12
Value
0010h
(*1)
(*1)
(*1)
(*1)
(*1)
(*1)
(*1) 1Bh
(*1) 0003h
(*1) 01h
(*1)
(*1)
(*1)
(*1)