IBM IC25N020ATDA04 Hard Drive Specifications - Page 193

Device Attribute Thresholds data structure, 33.2.12 Data Structure Checksum

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13.33.2.9 Error logging capability Bit Definition 7-1 Reserved (0) 0 The Error Logging support bit If bit = 1, the device supports the Error Logging 13.33.2.10 Self-test failure check point This byte indicates the section of self-test where the device detected a failure. 13.33.2.11 Self-test completion time These bytes are the minimum time in minutes to complete the self-test. 13.33.2.12 Data Structure Checksum The Data Structure Checksum is the 2's compliment of the result of a simple 8-bit addition of the first 511 bytes in the data structure. 13.33.3 Device Attribute Thresholds data structure The following defines the 512 bytes that make up the Attribute Threshold information. This data structure is accessed by the host in its entirety using the S.M.A.R.T. Read Attribute Thresholds. All multibyte fields shown in these data structures follow the ATA/ATAPI-5 specification for byte ordering. This means that the least significant byte occupies the lowest numbered byte address location in the field. The sequence of active Attribute Thresholds will appear in the same order as their corresponding Attribute Values. Description Data Structure Revision Number 1st Device Attribute ... ... 30th Device Attribute Reserved Vendor specific Data structure checksum Byte 2 12 .. .. 12 18 131 1 512 Offset Format 00h binary 02h (*1) Value 0010h (*2) 15Eh 16Ah 17Ch 1FFh (*1) (*2) (*3) (*3) (*2) Figure 121. Device Attribute Thresholds Data Structure (*1) - See the following definitions (*2) - Value varied by actual operating condition (*3) - Filled with 00h 13.33.3.1 Data Structure revision number This value is the same as the value used in the Device Attributes Values Data Structure. Travelstar 48GH, 30GN & 15GN hard disk drive specifications 179

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13.33.2.9 Error logging capability
If bit = 1, the device supports the Error Logging
The Error Logging support bit
0
Reserved (0)
7–1
Definition
Bit
13.33.2.10 Self-test failure check point
This byte indicates the section of self-test where the device detected a failure.
13.33.2.11 Self-test completion time
These bytes are the minimum time in minutes to complete the self-test.
13.33.2.12 Data Structure Checksum
The Data Structure Checksum is the 2's compliment of the result of a simple 8-bit addition of the first 511
bytes in the data structure.
13.33.3 Device Attribute Thresholds data structure
The following defines the 512 bytes that make up the Attribute Threshold information. This data structure
is accessed by the host in its entirety using the S.M.A.R.T. Read Attribute Thresholds. All multibyte fields
shown in these data structures follow the ATA/ATAPI-5 specification for byte ordering. This means that
the least significant byte occupies the lowest numbered byte address location in the field.
The sequence of active Attribute Thresholds will appear in the same order as their corresponding
Attribute Values.
512
(*2)
1FFh
1
Data structure checksum
(*3)
17Ch
131
Vendor specific
(*3)
16Ah
18
Reserved
(*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 121. Device Attribute Thresholds Data Structure
(*1) -
See the following definitions
(*2) - Value varied by actual operating condition
(*3) - Filled with 00h
13.33.3.1 Data Structure revision number
This value is the same as the value used in the Device Attributes Values Data Structure.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
179