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What are the individual test values or measurements for hard drives?

Here is the short explanation for each test and benchmark values in IsMyHdOK !

Sequentiall:
Write and Read linear eg. continuous.
4K:
Random read and write of 4 KB blocks. The position will be determined by a random number.
512K:
The same as 4 KB, random read and write 512 KB blocks.
64 x 4K:
The same as 4 KB, only that 64 requests are run at the same time (parallel).
Access Time:
The actually measured access time when reading and writing 4 KB blocks.

See also:
... the IsMyHdOK, SSDs or HDDs benchmark points!

(Image-1) Iindividual test values or measurements in IsMyHdOK!

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FAQ 4: Updated on: June 12th 2014 12:19

IsMyHdOK - FAQ-4: What are the individual test values or measurements for hard drives?
ist valid for Microsoft (c): Windows 10: Pro, Enterprise, Home, Windows and 8.1: Enterprise, Pro, Home Windows 7: Enterprise, Home, Basic, Premium, Professional, Starter, Ultimate Windows-Server 2016, 2012, 2008, 2005 .

... more information about the software IsMyHdOK

For what four different duration of Benschmarks?
You dont want to wait to long for the test results, to see if your HDD properly works AND: Too many tests may reduce the lifetime of HDDs, SSDs and other Drives.

How do I know if HD is bad then? Is it certain number!
Please open the the main menu IsMyHdOK and select Compare the Results on SoftwareOK.com

Why the IsMyHdOK , there are similar programs!
The answer to this question is quite simple, but you can also call FORD and ask, why they produce cars if there are Chrysler But joking aside, There are

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