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Created February 4, 2022 03:03
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How to optimize / defrag ext4 filesystem #ext4 #commandlinefu
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defrag_ext4_filesystem.md

How to optimize / defrag ext4 filesystem

Make sure the target filesystem is sane

Open up the terminal and run:

sudo fsck.ext4 -y -f -v /dev/<disk/partition>

Optimize the directories

sudo fsck.ext4 -y -f -v -D /dev/<disk/partition>

Done. Note : Pass 3A: Optimizing directories.

It also (almost always) reports :

****** FILE SYSTEM WAS MODIFIED *****

Don't panic, as long the previous 'fsck' went off without a hitch, all should be golden. Run the 'fsck' (Without '-D' option) once more sometimes just to see how much it optimized.

Optimize files

Mount your filesystem now.

(Right-click on your disk on the desktop or wherever and 'mount')

After mounting:

sudo e4defrag -v /dev/<disk/partition>

Now, unmount again with :

sudo umount /dev/<disk/partition> && cd /

Finally to check fragmentation stats:

sudo fsck.ext4 -y -f -v /dev/<disk/partition>

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