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Still relevant for current Windows versions: hard drive – defrag /x – consolidate free space not really working – Windows Server 2012 – Server Fault

Posted by jpluimers on 2021/06/11

From my answer at [WayBack] hard drive – defrag /x – consolidate free space not really working – Windows Server 2012 – Server Fault

I’ve tried many tools, starting with defrag C: /X (which tries, but doesn’t give good results) and found out these steps give the best results:

  1. Perform an Ultradefrag full optimisation
  2. Perform a MyDefrag Consolidate free space script on the drive.

Note that MyDefrag (formerly named JkDefrag) is not maintained any more but the 4.3.1 version in the WayBack machine still works very well as the underlying defragmentation APIs in Windows haven’t changed.


The original MyDefrag disappeared two times (temporarily in 2014 because the domain expired, then permanently in 2017 because the domain went off-line).

Luckily, the WayBack machine at has the latest version saved (not all the links from the search page have an executable as sometimes it shows the expired domain or a non-existing redirect when the domain got off-line):

Note that chocolatey install --yes mydefrag --version 4.3.11 fails because of the missing download. See [WayBack] Chocolatey Software | MyDefrag 4.3.1.

(The --version parameter trick is from [WayBack] Chocolatey – How to install hidden and unlisted package? – Super User, via [WayBack] “This package is unlisted and hidden from package listings.” – Google Search).


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