faubackup filling disc

[Dexter <dexter@madalbal.sk>]

Hi,
i use faubackup to make backup of server to backup server. I keep 7 days
hystory:
# cat /etc/faubackup.conf
package FAUBACKUP;
$backup         = "/var/backups/server";
$autocreate     = 0;
$keepyears      = -1;
$keepmonths     = -1;
$keepweeks      = -1;
$keepdays       = 7;
$rsh            = "rsh";
1;
#

In cron i use this two commands:
at 20:30 ... faubackup --clean /var/backups/server/data
at 21:00 ... faubackup -L /mnt/server/data/ /var/backups/server/data/

So i have 7 directories with hard copies (of not changed files). Disk is
filled to 63% .

Problem start when backup for some reason doesnt finish and live
directory "working-3416". On google i read that i can safely remove this
directory, but when i remove this directory, next backup fill disk to
100%. It looks like, after i delete working... directory, that faubackup
is not making hardlinks of files anymore, but copies them again.
Do you have idea?
   Thanks a lot
       Dexter
<https://vishnu:10000/cron/edit_cron.cgi?idx=10>