LaView Cube Series, User Manual

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User Manual of Cube DVR Series
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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
200 Write Error Count
Note: Different manufacturers and different models have different attribute description, user has no need to know exact
meaning, attribute detection values enough for them.
3 Thresholds
It is specified by manufacturer calculated through a specific formula. If there is a attribute value lower than the threshold, which
means HDD become unreliable and data stored is very easy to lose. Composition and size of reliable attribute values is different for
different HDD. It should be noted that, ATA standard only provides some SMART parameters; it does not provide a specific value.
"Threshold" value is determined by manufacturers based on products‟ features. Thus, results tested by manufacturer provided
detection software is very different from testing software under Windows (such as AIDA32)
4 Attribute Value
Attribute value is the maximum normal value; the general range is from 1 to 253. Typically, the maximum attribute value is 100 (for
IBM, Quantum, and Fujitsu) or 253 (for Samsung). Of course, there are some exceptions, for example, some models produced by
Western Digital have two different attribute values, and property value is set 200 when initial production, but after then it is changed
into 100.
5 Worst
Worst value is the largest non-normal value in HDD‟s running. It is a value calculates for HDD‟s cumulative running, it is constantly
refreshed according to running cycle, and very closed to the threshold. Whether the HDD is normal by S.M.A.R.T analysis is based
on the comparison with threshold. The maximum value appear when new HDD start to use, which would continue to decrease with