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SMART Technology & Fault detection
- S.M.A.R.T. stands for Self-Monitoring Analysis and
Reporting Technology.
- S.M.A.R.T. technology was developed by a number of
major hard disk drive manufacturers to increase the
reliability of hard drives.
- It is a technology that enables the PC to predict the
future failure of hard disk drives.
- It monitors disk performance, faulty sectors, CRC
errors, drive spin-up time, drive heads, distance
between the heads and the disk platters, drive
temperature, and characteristics of the media, motor
and servomechanisms.
- The errors the system can detect can be predicted by
a number of methods. Currently the SMART system can
When a failure is anticipated by S.M.A.R.T technology, the drive is
typically replaced, then being returned to the manufacturer who use these
dead drives to discover where faults lie and how to prevent them
reoccurring on the next generation of Hard Disk Drives
Fundamentally, hard-drive failures fall into one of two basic classes :
- Predictable failures
- Unpredictable failures
The purpose of S.M.A.R.T. is to warn a user or system administrator of
impending drive failure while there is still time to take preventive action,
such as copying the data to a replacement device.
- The most basic information that SMART provides is the SMART
status. It provides only two values: "threshold not exceeded" and
"threshold exceeded". Often these are represented as "drive OK" or
"drive fail" respectively.
