As-tu essayer de monter ce disque sur un système Windows ?
Les procédures de recovery pour un système de fichier NTFS sont plus abouties sur Windows que sur Linux...
Une alternative est d'installer ntfsprogs
The ntfsprogs package currently consists of a library and utilities such as mkntfs, ntfscat, ntfsls, ntfsresize, and ntfsundelete (for a full list of included utilities see man 8 ntfsprogs after installation).
et d'essayer de lancer ntfsfix :
ntfsfix is a utility that fixes some common NTFS problems. ntfsfix is NOT a Linux version of chkdsk. It only repairs some fundamental NTFS inconsistencies, resets the NTFS journal file and schedules an NTFS consistency check for the first boot into Windows.
You may run ntfsfix on an NTFS volume if you think it was damaged by Windows or some other way and it cannot be mounted.