by default, when you create a new ext2 filesystem, 10% of that space is
reserved for various things like inodes and such.  so, for a 20 gig drive,
that is ~2 gig.  if you run this command:

# tune2fs -m 5 /dev/hdc2

it will reclaim 1 gig, or 5% of that 10% reserved.  or you can adjust it to
your liking.  realize that there is a tradeoff for this.  the less reserved
space you have, the few total number of files you can, and inodes.  i usally
go with 5% and i've never had a problem.  hope this helps out.

jason


> Wondering why my math doesn't agree with what I see for the last two
> drives.  Where did the last GB go?
>
> [root@inws kevin]# df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/hda1             1.9G  1.4G  421M  77% /
> /dev/hda5              12G  8.5G  2.6G  76% /mnt/dev/hda5
> /dev/hdc2              27G   24G  2.0G  92% /mnt/dev/hdc2
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