13.39.2 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 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.
Table 115: Device Attribute Data Structure
Description
Data Structure Revision Number
1st Device Attribute
...
30th Device Attribute
Off-line data collection status
S.M.A.R.T. device error logging capability
Short self-test completion time in minutes
Extended self-test completion time in minutes
(*1) - See following definitions
(*2) - This value varies due to actual operating condition.
(*3) - Filled with 00h.
13.39.2.1 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.
Travelstar 7K100 Hard Disk Drive Specification
169
Byte
Offset
Format
2
00h
binary
12
02h
(*1)
12
15Eh
(*1)
1
16Ah
(*1)
1
16Bh
(*1)
2
16Ch
(*1)
1
16Eh
(*1)
1
16Fh
(*1)
2
170h
(*1)
1
172h
(*1)
1
173h
(*1)
1
174h
(*1)
1
175h
(*1)
12
176h
125
182h
1
1FFh
(*1)
512
Value
0010h
(*2)
(*2)
(*2)
(*2)
(*2)
(*2)
1Bh
0003h
01h
(*2)
(*2)
(*2)
(*3)
(*3)
(*2)