13.32.2 Device Attributes 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 follow the ATA/ATAPI-5 specification for byte ordering, namely, that
the least significant byte occupies the lowest numbered byte address location in the field.
512
(*2)
(*1)
1FFh
1
Data structure checksum
(*3)
182h
125
Vendor specific
(*3)
176h
12
Reserved
(*2)
(*1)
175h
1
Extended self-test completion time in minutes
(*2)
(*1)
174h
1
Short self-test completion time in minutes
(*2)
(*1)
173h
1
Self-test failure check point
01h
(*1)
172h
1
S.M.A.R.T. device error logging capability
0003h
(*1)
170h
2
S.M.A.R.T. capability
1Bh
(*1)
16Fh
1
Off-line data collection capability
(*2)
(*1)
16Eh
1
Current segment pointer
(*2)
(*1)
16Ch
2
Total time in seconds to complete off-line
data collection activity
(*2)
(*1)
16Bh
1
Self-test execution status
(*2)
(*1)
16Ah
1
Off-line data collection status
(*2)
(*1)
15Eh
12
30th Device Attribute
↕
↕
↕
↕
↕
(*2)
(*1)
02h
12
1st Device Attribute
0010h
binary
00h
2
Data Structure Revision Number
Value
Format
Offset
Byte
Description
(*1)
–
See following definitions
(*2)
–
This value varies due to actual operating condition.
(*3) - Filled with 00h.
Figure 123. Device Attribute Data Structure
13.32.2.1 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.
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
170
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