df not reporting correct free space - hard link problems?

[Neil Bird]

   On my (ext3, LVM) drive on which I perform backups, I went to copy a 
large directory and starting getting loads of out-of-space errors, even 
though 'df' reports plenty of room, even to non-root users.


$ df -h /usr/backup
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/sata0-backup
                       464G  367G   88G  81% /usr/backup

.. but:

mv: cannot create regular file `blah': No space left on device


   Now, I am using rsync to create daily+weekly backups on that drive, so 
there are wads of hard links to things several times over.  But 'df' should 
be able to cope with that, shouldn't it?

   I ran a forced fsck on the drive, but that reported no problems.  Any 
ideas anyone?

-- 
[neil at fnx ~]# rm -f .signature
[neil at fnx ~]# ls -l .signature
ls: .signature: No such file or directory
[neil at fnx ~]# exit