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7K200 SATA OEM Specification

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Description Bytes

Offset

Format

Attribute ID Number (01h to FFh)

00h

binary

Attribute Threshold (for comparison with Attribute Values
from 00h to FFh)

01h binary

00h -

“always passing” threshold value to be
used for code test purposes

01h -

minimum value for normal operation

FDh -

maximum value for normal operation

FEh -

invalid for threshold value

FFh -

“always failing” threshold value to be used
for code test purposes

Reserved (00h)

02h

binary

Total Bytes

Table 115 Individual Threshold Data Structure

14.39.3.3

Attribute ID Numbers

Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.

14.39.3.4

Attribute Threshold

These values are preset at the factory and are not meant to be changeable. However, the host
might use “ S.M.A.R.T. Write Attribute Threshold” subcommand to override these preset values

in the Threshold sectors.

14.39.3.5

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.

14.39.4

S.M.A.R.T. Log Directory

Following table defines the 512 bytes that make up the S.M.A.R.T. Log Directory. The S.M.A.R.T.

Log Directory is on S.M.A.R.T. Log Address zero and is defined as one sector long.

Description Bytes

Offset

S.M.A.R.T. Logging Version

00h

Number of sectors in the log at log address 1

02h

Reserved 1

03h

Number of sectors in the log at log address 2

04h

Reserved 1

05h

… …

…

Number of sectors in the log at log address 255 1

1FEh

Reserved 1

1FFh

512

Table 116 SMART Log Directory

The value of the S.M.A.R.T. Logging Version word shall be 01h. The logs at log addresses

80-9Fh are defined as 16 sectors long.

14.39.5

S.M.A.R.T. error log sector

The following defines the 512 bytes that make up the S.M.A.R.T. error log sector. All multi-byte