Toshiba MK4006GAH Computer Drive User Manual


 
Toshiba Corporation Digital Media Network Company
Page 139 of 153
© 2003, Copyright TOSHIBA Corporation All Rights Reserved
11.10 Self-Monitoring, Analysis and Reporting Technology
Self-monitoring, analysis and reporting technology (SMART) is the function to protect user data and to
minimize the likelihood of unscheduled system downtime that may be caused by predictable degradation
and/or fault of the drive. By monitoring and storing the critical performance and calibration parameters,
SMART drives attempt to predict the likelihood of near-term degradation or fault condition. The host system
warns the user of the impending risk of data loss and advises the user of appropriate action by informing the
host system of the negative reliability .
SMART commands use a single command code and are differentiated by the value placed in the Features
register.
The Commands supported by this feature set are:
.
SMART READ ATTRIBUTE VALUES
SMART READ ATTRIBUTE THRESHOLDS
SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE
SMART SAVE ATTRIBUTE VALUE
SMART EXECUTE OFF-LINE IMMEDIATE
SMART READ LOG SECTOR
SMART WRITE LOG SECTOR
SMART ENABLE OPERATIONS
SMART DISABLE OPERATIONS
SMART RETURN STATUS
SMART ENABLE/DISABLE AUTOMATIC OFF-LINE
11.10.1 Attributes
Attributes are the specific performance or calibration parameters that are used in analyzing the status of the
drive. Attributes are selected by the drive manufacturer based on that attribute’s ability to predict degrading or
faulty conditions for that particular drive. The specific set of attribute being used and the identity of these
attributes is vendor specific and proprietary.
11.10.2 Attributes values
Attribute values are used to measure the relative reliability of individual performance or calibration attributes.
11.10.3 SMART function default setting
The drives are shipped from the drive manufacturer’s factory with the SMART feature disabled. SMART
feature will be enabled by the system manufacturer or the application.