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S.M.A.R.T: “Self‐Monitoring, Analysis and Reporting Technology”
S.M.A.R.T HDD can analysis head, disc, motor, circuit operation, history and default security values via
monitor instruction in HDD and surveillance software in host. Alarm will be sent to user automatically
when the value is outside the scope of the security situation.
Detection parameters of Seagate HDD for example are divided into seven: ID detection code, Attribute
Description, Threshold, Attribute Value, Worst, Date, and Status.
1
ID
detection
code
ID detection code is not the only; manufacturer can use different ID code or increase or decrease its
quantity according to the detected parameter’s quantity.
For example: the ID detection code of WEASTERN DIGITAL’s product is “04”, parameter is Start/Stop
Count, but the parameter of same code in Fujitsu’s product is “Number of times the spindle motor is
activated”.
2
Attribute
Description
Attribute Description: name of detection item. Manufacturer can increase or decrease . As ATA
standard update constantly, sometimes different models in same brand maybe different ,but must
ensure major test items specified in S.M.A.R.T .(although different manufacturers have specific naming
convention ,the essence of monitoring is the same.)
1 Read Error Rate
2 Spin up Time
4 Start/Stop Count
5 Relocated Sector Count
7 Seek Error Rate
9 Power‐on Hours Count
10 Spin up Retry Count
194 Power temperatures
195 ECC on the Fly count
197 Current Pending Sector Count
198 Disconnection beyond repair
199 CRC cyclic redundancy check
