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start:ext4secret

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Ext keeps some reserved space so that if the disk is full a root user can login and still do stuff in the reserved space. However this value is quite large. If you have a modern disk then it can be many GB of space. As its default is 5% then for example on a 2TB disk that is approx 100GB of space reserved.

Normally I change it down to 2% from the default of 5%. The command would be (assuming the disk is /dev/sda2):

tune2fs -m 2 /dev/sda2

Then you can get some of the reserved space back :)

start/ext4secret.1652212457.txt.gz · Last modified: 2022/05/10 19:54 by peter