[CentOS] df -h shows system at 100% used, but there is space left

Flaherty, Patrick pflaherty at wsi.com
Wed Apr 29 15:28:10 UTC 2009

> Has anyone seen output like this before? Notice on my 
> /dev/md0 That it reports 100% used, but also 5.3 Gb 
> available. What would cause this?
> # df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda2              71G  1.6G   66G   3% /
> /dev/sda1              99M   22M   73M  23% /boot
> tmpfs                 506M     0  506M   0% /dev/shm
> /dev/md0              903G  851G  5.3G 100% /home

I've never run into the reserved blocks being an issue (even though it
may be the case here). I have run out of inodes (one per file, and if
you have a ton of little files...). Run df -i to see what percent inodes
your using. 

Wikipedia has a good explaination of inodes

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