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The eCryptfs layered file system approach also eliminates the need for a dedicated partition, sparse file, or preallocated disk space for the encrypted data. eCryptfs files are written to the administrator’s chosen underlying file system with the total disk capacity available. Since each encrypted file is written to disk as an atomic unit, users can perform per-file incremental encrypted backups to remote storage – something that is impractical and dangerous with block device encryption solutions.



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