Hard disk -- Free space not equal to available space ??

[michaeleekk]

I'm using the gnome.
I started a System Monitor, then Devices, and saw that my fedora partition ...
Device Directory Type Total Free Available Used
/dev/sda1 / ext3 42.6GiB 21.7GiB 19.5GiB 20.8GiB

Why Free space isn't equal to the available space ?
How can I make all the free space available again ?

[wneumann]

There is space reserved for root, the so-called superblock, which contains information about the state of the filesystem. If you check free and available space as root they will probably be the same. I think the reserved space is a percentage of disk size and is pretty minimal. But as your disk fills up it makes the ratio of available to free increase so it looks more significant.

[michaeleekk]

I see....
Thanks for your answer