Apc iSCSI SATA II User Manual download pdf (Page 64)

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3.7.3 Hard Drive S.M.A.R.T. Function

S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) is a diagnostic tool

for hard drives to deliver warning of drive failures in advance. S.M.A.R.T. provides

users chances to take actions before possible drive failure.

S.M.A.R.T. measures many attributes of the hard drive all the time and inspects the

properties of hard drives which are close to be out of tolerance. The advanced notice

of possible hard drive failure can allow users to back up hard drive or replace the hard

drive. This is much better than hard drive crash when it is writing data or rebuilding a

failed hard drive.

“S.M.A.R.T.” function can display S.M.A.R.T. information of hard drives. There are

two values: the number on the left is the current value, and the number in

parenthesis is the threshold value. If the current value becomes lower than the

threshold value, the hard drive is in unstable state. The threshold values of hard drive

vendors are different. Please refer to vendors’ specification for details.

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Apc iSCSI SATA II User Manual Page 64