> From: Uematsu Takeshi <takeshi.uematsu@xxxxxxxxx>
> To: ext3-users@xxxxxxxxxx
> Subject: minus disk usage
>
> Hi,This is Takeshi Uematsu.
>
> I have a trouble on the ext3 filesystem.
> The df command indicates minus disk usage.
> Dose anyone know why this happned ?
> Any ideas be appreciated.
>
> # df -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/sda2 97G -26G 118G - /
> /dev/sda1 99M 15M 80M 16% /boot
> tmpfs 2.0G 0 2.0G 0% /dev/shm
> /dev/sda3 803G 3.9G 758G 1% /home
>
> fdisk /dev/sda
>
> Device Boot Start End Blocks Id System
> /dev/sda1 * 1 13 104391 83 Linux
> /dev/sda2 14 13067 104856255 83 Linux
> /dev/sda3 13068 121193 868522095 83 Linux
> /dev/sda4 121194 121454 2096482+ 82 Linux swap / Solaris
You should really do a fsck of the "/" FS. You should have a backup
before doing a fsck because if there are major errors, running a
fsck can make a FS unusable.
A couple of other things you can try before doing a fsck are:
Use dumpe2fs and see if there are any issues;
dumpe2fs /dev/sda2
Use find cmd to list any "unusually" large files, adjust the
value +100000 as needed;
find / -mount -size +100000 -exec ls -l {} \;
Check the sizes of the directories and files within, here is a
variation of a script I use to do this to list the 10 largest
directories of the "/" FS;
for d in $( ls -1 / ) ; do
if [[ "x$d" = "xboot" || "x$d" = "xhome" ]] ; then
:
else
ls -d /$d
du -sk /$d
fi
done | sort -n | tail
You can then check each of the listed directories with the following;
du -sk /usr/* | sort -n | tail
and do this on the directories listed until you find the issue.
Lastly re-boot the system with a CD installed it the system with, or
later, enter "linux rescue" and run fsck on the root FS. If there
are any errors, answering yes will try to correct the FS errors.
Greg
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