HD writing in diagonal pattern

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Richard James Regular Member • Posts: 386
HD writing in diagonal pattern

One of my HD's has started writing (all?) data in diagonal lines across the drive instead of contiguous blocks. (As shown by PerfectDisk Defrag software.) It does not appear with any other HDs.

The small blocks contain files written by different apps at different times.

This has happened for the last 3 weeks. After the first I "consolidated free space" which moved them to the main block of data. A week later the same pattern was present.

Chkdsk (no options and /scan) are clean.

WD Data Dashboard and Sea Tools for Windows both show no errors.

WD advise that the drive is OK, and the drive itself can't do this, but that it is an "OS problem" (Win 10 Pro 21h1, up-to-date).

Does anyone have any idea what is causing this?

Thanks

Richard

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