[gentoo-user] can't create file but disk isn't full

[Crístian Viana]

hi everyone,

something weird is happening on my system. I can't create new files, it says
"No space left on device", but the disk has several gigabytes of free space!
the output of "df -h" is:

Filesystem            Size  Used Avail Use% Mounted on
rootfs                 35G   23G   11G  69% /
/dev/root              35G   23G   11G  69% /
rc-svcdir             1.0M  120K  904K  12% /lib64/rc/init.d
udev                   10M  240K  9.8M   3% /dev
shm                   974M  1.1M  973M   1% /dev/shm
/dev/sda6             157G  133G   17G  89% /home
/dev/sda1              35G   28G  7.6G  79% /mnt/windows

I'm running out of space on the home partition. it says it has 17 GB of free
space, but right now there's only 330 MB available (I wrote a small program
to create the largest file it can). this was happening before, when I had a
few gigabytes free, but now the [fake] available space is growing and I'm
losing space on my disk each day! where should I start looking for to solve
this problem? the filesystem of the home partition is ext4.

I don't even know if this is related to Gentoo, but that's the OS I'm
running :-) I'm running ~amd64, by the way.

regards.