Hitachi HTS541010G9AT00 Specifications - Page 169
S.M.A.R.T Log Directory
UPC - 000061425019
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12.38.4 S.M.A.R.T Log Directory Table 121 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. Table 104: S.M.A.R.T. Log Director Description S.M.A.R.T. Logging Version Number of sectors in the log at log address 1 Reserved Number of sectors in the log at log address 2 Reserved ... Number of sectors in the log at log address 255 Bytes 2 1 1 1 1 ... 1 512 Offset 01h 02h 03H 04H 05h ... 1FEh 12.38.4.1 Data Structure Revision Number This value is the same as the value used in the Device Attributes Values Data Structure. 12.38.4.2 Individual Thresholds Data Structure 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. Table 105: Individual Threshold Data Structure Description Attribute ID Number (01h to FFh) 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 Reserved (00h) Total Bytes Byte 1 1 10 12 Offset 00h 01h Format binary binary 02h binary 12.38.4.3 Attribute ID Numbers Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures. 12.38.4.4 Attribute Threshold 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" subcommand to override these preset values in the Threshold sectors. Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification 157