Samsung MZMPC128HBFU-00000 Manuale Utente

- 26 -

        datasheet

The following defines the 12 bytes that make up the information for each Threshold entry in the Device Attribute Thresholds Data Structure. Attribute 
entries in the Individual Threshold Data Structure are in the same order and correspond to the entries in the Individual Attribute Data Structure.

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

These values are preset at the factory and are not meant to be changeable. However, the host might use the "S.M.A.R.T. Write Attribute Threshold" sub-
command to override these preset values in the Threshold sectors.

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.

The following 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.

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.

0

Attribute ID Number (01h to FFh)

1

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

2~11

Reserved (00h)

0~1

S.M.A.R.T. Logging Version

2

Number of sectors in the log at log address 1

3

Reserved

4

Number of sectors in the log at log address 2

5

Reserved

...

510

Number of sectors in the log at log address 255

511

Reserved