Linux missing disk space

Posted by cpt.Buggy on Server Fault See other posts from Server Fault or by cpt.Buggy
Published on 2012-10-04T12:25:45Z Indexed on 2012/10/04 15:41 UTC
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linux

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diskspace

I have KVM vps with strange disk usage:

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdb              493G  1.2G  466G   1% /
tmpfs                 4.0G     0  4.0G   0% /dev/shm
/dev/sda1              96M   41M   51M  45% /boot

# du -sh /
du: cannot access `/proc/1633/task/1633/fd/4': No such file or directory
du: cannot access `/proc/1633/task/1633/fdinfo/4': No such file or directory
du: cannot access `/proc/1633/fd/4': No such file or directory
du: cannot access `/proc/1633/fdinfo/4': No such file or directory
1021M   /

How could it be? Where are ~20G of free space?

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