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<blockquote data-quote="kiwijunglist" data-source="post: 1012498" data-attributes="member: 76888">YES! All fixed&nbsp;I used robocopy to copy some important files, with retry set to 0 so it skipped any bad files.Then deleted partition -&gt; low level format (to check writing each sector, no bad sectors) -&gt; WD Tools 'scandisk', no bad sectors.So D:\ is back to normal speed (35mb/s instead of 1.5mb/s and errors)&nbsp;Thank fully I had backed up a lot of data previously so I only lost ~300gb of active downloads and ~1gb of non-backed up music.&nbsp;I suspect the problem was I use a program called snapRAID to backup my data. It has an addon that creates a folder with symlinks to all my backed up media. So if you can imagine 9TB of symlinks that is A LOT of symlinks, and I think it may of somehow messed up the HDD's filetable. I think perhaps windows was doing a scheduled defrag at the same time I was recreating the symlinks.</blockquote>

[QUOTE="kiwijunglist, post: 1012498, member: 76888"] YES! All fixed I used robocopy to copy some important files, with retry set to 0 so it skipped any bad files. Then deleted partition -> low level format (to check writing each sector, no bad sectors) -> WD Tools 'scandisk', no bad sectors. So D:\ is back to normal speed (35mb/s instead of 1.5mb/s and errors) Thank fully I had backed up a lot of data previously so I only lost ~300gb of active downloads and ~1gb of non-backed up music. I suspect the problem was I use a program called snapRAID to backup my data. It has an addon that creates a folder with symlinks to all my backed up media. So if you can imagine 9TB of symlinks that is A LOT of symlinks, and I think it may of somehow messed up the HDD's filetable. I think perhaps windows was doing a scheduled defrag at the same time I was recreating the symlinks. [/QUOTE]

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