Hi Holger , 
sorry for the confusion i made . . (I am relatively new in linux world)
i did read  the Documentation regrading the TopDir portion "Copying the pool"
but i did not understand the "script bin/BackupPC_tarPCCopy"  thats why i 
submit the question 
but here is what i did to make it work . .
$ cp -avr /var/lib/BckupPC/*  /backup/Data/
### knowing that /backupc/Data is a Directory i made for backup which resides 
on a Raid-5 LVM Volume 
$ /etc/init.d/backuppc restart
Shutting down BackupPC:                                  [  OK  ]
Starting BackupPC:                                         [  OK  ]

thank you my friend for pointing out : )
Regards

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