Je viens d'essayer de "monter" le partage ftp avec curlftpfs. Mais lorsque je lance un test de rdiff-backup, j'obtiens les message suivant :

Cannot change permissions on target directory.
Warning: hard linking not supported by filesystem at /home/dbelge/backup/test/rdiff-backup-data
Exception 'Unable to open logfile /home/dbelge/backup/test/rdiff-backup-data/backup.log: [Errno 95] Operation not supported: '/home/dbelge/backup/test/rdiff-backup-data/backup.log'' raised of class '<class 'rdiff_backup.log.LoggerError'>':
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 302, in error_check_Main
    try: Main(arglist)
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 322, in Main
    take_action(rps)
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 278, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 335, in Backup
    backup_final_init(rpout)
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 434, in backup_final_init
    Log.open_logfile(Globals.rbdir.append("backup.log"))
  File "/var/lib/python-support/python2.5/rdiff_backup/log.py", line 61, in open_logfile
    rpath.conn.log.Log.open_logfile_local(rpath)
  File "/var/lib/python-support/python2.5/rdiff_backup/log.py", line 76, in open_logfile_local
    % (rpath.path, e))

Traceback (most recent call last):
  File "/usr/bin/rdiff-backup", line 23, in <module>
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 302, in error_check_Main
    try: Main(arglist)
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 322, in Main
    take_action(rps)
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 278, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 335, in Backup
    backup_final_init(rpout)
  File "/var/lib/python-support/python2.5/rdiff_backup/Main.py", line 434, in backup_final_init
    Log.open_logfile(Globals.rbdir.append("backup.log"))
  File "/var/lib/python-support/python2.5/rdiff_backup/log.py", line 61, in open_logfile
    rpath.conn.log.Log.open_logfile_local(rpath)
  File "/var/lib/python-support/python2.5/rdiff_backup/log.py", line 76, in open_logfile_local
    % (rpath.path, e))
rdiff_backup.log.LoggerError: Unable to open logfile /home/dbelge/backup/test/rdiff-backup-data/backup.log: [Errno 95] Operation not supported: '/home/dbelge/backup/test/rdiff-backup-data/backup.log

En survolant rapidement déjà je vois que tu as un problème de permission sur ton serveur ftp (du moins sur dossier dans le quel tu veux mettre ton backup).

Il te faut modifier tes permissions sur ton serveur ftp, donc déjà la.