Is it safe to defrag ext4 file system using e4defrag?

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?


  • 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.