Does Health status predict actual health

How, what, where and why - when using the software.
rzhossain
Posts: 1
Joined: 2014.03.15. 19:30

Does Health status predict actual health

Post by rzhossain »

Hello, My laptop HD health status shows 18%.I did a complete "reinitialize disk surface" test which found no error sector - all green blocks. But HD extended "Test failed by read element".Yet my HD status remains 18%. I m confused if I should go for a warranty replacement, since I have 18 months warranty left, or I should rely on this HD.The HD runs well ,no physical problem at all, except that it has some marked/fixed bad sectors.Can I rely on this?
There are 243 bad sectors on the disk surface. The contents of these sectors were moved to the spare area.
The drive found 1 bad sectors during its self test.
There are 1 weak sectors found on the disk surface. They may be remapped any time in the later use of the disk.
13798 errors occured during data transfer. This may indicate problem of the device or with data/power cables. It is recommended to examine and replace the cables if possible.
At this point, warranty replacement of the disk is not yet possible, only if the health drops further.
It is recommended to examine the log of the disk regularly. All new problems found will be logged there.
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hdsentinel
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Re: Does Health status predict actual health

Post by hdsentinel »

Yes of course, this is exactly the purpose of hard disk monitoring and health detection.
Hard Disk Sentinel detects and shows the actual problems and displays a suggestion with a health value based on that.

As you can see, your hard disk is far from perfect - just the amount of bad sectors and problems are not yet enough to get a warranty replacement. When the error-threshold reached, your hard disk will report 0% health.

The "bad sectors" reported in the text description are no longer used by the hard disk: they are already reallocated.
It means that the spare area is used for all reads and writes targeting those bad sectors. This means that disk surface access by any read/write command (or even the tests in Hard Disk Sentinel) does not access those sectors, but tests the remaining data area and the spare area.

This is good, as this way you can be sure that the original (bad) area can not contain important data and can't risk data loss.

This is why the detected and reported bad sectors can NEVER cause problems, regardless of their position because that problematic area is never used any more. This is why manufacturers (really shame but work this way) "allow" some bad sectors and may not offer warrantly replacement.

In this case, if the test shows no problems, it means that currently all such bad sectors are fixed by reallocation and now the complete surface (the remaining sectors and the spare area) can be fully used. However, if the amount of problems is high - and the reported health low - there is high chance that new and new problems will be reported which will decrease the health further - and may risk data corruption / loss.

Now you may continue using the hard disk - but personally I'd use it only for secondary storage, not to store important data, and also I'll use it with constant monitoring and performing backup on any (even minor) change if the displayed health.
If you prefer, you may try to ask warranty replacement, nowadays manufacturers may replace even with less problems, when the actual error-level is not yet reached. But there is chance that you'll get a replacement drive with an even worse condition.

For more information about these bad sectors and further information,
please click on the "?" next to the text description area of Hard Disk Sentinel and check
http://www.hdsentinel.com/faq.php#health and
http://www.hdsentinel.com/faq.php#tests
http://www.hdsentinel.com/faq_repair_ha ... _drive.php
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