50 Shades of Green

How, what, where and why - when using the software.
fireoak
Posts: 1
Joined: 2020.04.28. 17:33

50 Shades of Green

Post by fireoak »

I have looked through the documentation and searched the forum for "shades" but have not had much success. Can someone tell me what the different shades of green mean when running a surface test? I'm running a write and read (distructive) on a micron SSD drive that was ejected from a RAID-1 array as BAD. But it looks fine and I have so far encountered no indication that it is bad. I am running the Pro and registered version BTW. The surface test has mostly light green squares, however there are a number of slightly darker green some mid-green and dark green squares - often together. What should I interpret that to mean?
Thank you in advance. (Oh no Damaged or Bad sectors yet). :mrgreen:
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hdsentinel
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Re: 50 Shades of Green

Post by hdsentinel »

If you can't find the answer anywhere - then just look in the Help ;)
It contains the details of course:

Help -> Hard disk tests -> Surface test:
https://www.hdsentinel.com/help/en/61_surfacetest.html

Darker green color means that the sectors are slower and harder to process (read or write depending on the test type) but they are still good. Having some (especially random) darker green blocks are completely acceptable unless they form a continuous, larger area (especially with yellow/red blocks near).

SSDs (and generally flash storage) very commonly show fluctuations in the transfer speed (which results darker green colors). It is completely normal.
When the surface test completed, you can verify the speed on the "Temperature and transfer speed" tab on the top.

The bottom of that help page shows some examples which may require attention, for example if there are lots of dark green blocks near/around yellow and red ones.
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