Mondo rescue

Bonjour,
J'ai installer mondo rescue
decider du chemin qui est un repertoire monter sur mon linux et qui pointe dans un dossier partager de mon pc distant windows

je configure mondo en choisissant Hard disk
et il refuse de créer mon iso :

See /var/log/mondoarchive.log for details of backup run.
---FATALERROR--- move_files_to_cd() - unknown media size
If you require technical support, please contact the mailing list.
See http://www.mondorescue.org for details.
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Log file: /var/log/mondoarchive.log
FYI, I have gzipped the log and saved it to /var/cache/mondo/MA.log.gz.
Mondo has aborted.
Execution run ended; result=254
Type 'less /var/log/mondoarchive.log' to see the output log

HELP...