IBM IC25N020ATDA04 Hard Drive Specifications - Page 188

Device Attributes Data Structure, 33.2.1 Data Structure Revision Number

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13.33.2 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. Description Data Structure Revision Number 1st Device Attribute Byte 2 12 Offset Format Value 00h binary 0010h 02h (*1) (*2) 30th Device Attribute 12 Off-line data collection status 1 Self-test execution status 1 Total time in seconds to complete off-line 2 data collection activity Current segment pointer 1 Off-line data collection capability 1 S.M.A.R.T. capability 2 S.M.A.R.T. device error logging capability 1 Self-test failure check point 1 Short self-test completion time in minutes 1 Extended self-test completion time in minutes 1 Reserved 12 Vendor specific 125 Data structure checksum 1 512 15Eh 16Ah 16Bh 16Ch 16Eh 16Fh 170h 172h 173h 174h 175h 176h 182h 1FFh (*1) (*1) (*1) (*1) (*1) (*1) (*1) (*1) (*1) (*1) (*1) (*1) (*2) (*2) (*2) (*2) (*2) 1Bh 0003h 01h (*2) (*2) (*2) (*3) (*3) (*2) Figure 118. Device Attribute Data Structure (*1) - See the paragraphs below for definitions of titles in the Description column. (*2) - This value varied due to actual operating condition. (*3) - Filled with 00h 13.33.2.1 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 48GH, 30GN & 15GN hard disk drive specifications 174

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13.33.2 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
Figure 118. Device Attribute Data Structure
(*1) -
See the paragraphs below for definitions of titles in the Description
column.
(*2) -
This value varied due to actual operating condition.
(*3) - Filled with 00h
13.33.2.1 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 48GH, 30GN & 15GN hard disk drive specifications
174