ext4: How to account for the filesystem space?
After googleing a little I find that ext4 reserve 5% for root: Reserved space for root on a filesystem - why?, ext2/3/4 reserved blocks percentage purpose. And if I use
tune2fs to set the number of reserved blocks to 0, it will take them back. But I use that code on a 100MB volume and get half of the reserving space, it was 10.5MB, and after setting to 0 the used space became 5.5MB. Why is the used space still not zero?
I used the following command to set the reserved space:
tune2fs -m 0 /dev/mapper/truecrypt1