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My file system partition is 90GB, and now 75% of the space is free after removing 53GB of recovered files using photorec from my home directory. I just want to know, is it safe to defrag the whole file system using e4defrag, or are there any extra precautions that I should be aware of?

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    Close-voters: Why would this be off-topic? This is a question about using Ubuntu software. Please see the FAQ.
    – Eliah Kagan
    Mar 10, 2013 at 2:42
  • possible duplicate of Is e4defrag ready for use?
    – e-sushi
    Apr 11, 2015 at 2:47

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  • It is safe to use, otherwise it would not be available or have a big red warning when trying to use it.
  • Here is a good document on ext4 and defragging.
  • Do not expect to see dramatic benefits since ext4 is made to work without the need for defragmentation.
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    I've just extended my raid, and used e2resize to extend the file system too. In such cases it could be useful to run a defrag.
    – Agoston Horvath
    Nov 3, 2014 at 9:36

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