backup program for disk arrays

 SnapRAID is a backup program for disk arrays. It stores parity
 information of your data and it recovers from up to six disk
 failures.
 .
 SnapRAID is mainly targeted for a home media center, where you
 have a lot of big files that rarely change.
 .
 Beside the ability to recover from disk failures, the other
 features of SnapRAID are:
 .
  * You can use disk already filled with files, without the need to
    reformat them. You will access them like now.
  * All your data is hashed to ensure data integrity and to avoid
    silent corruption.
  * If the failed disks are too many to allow a recovery,
    you lose the data only on the failed disks.
    All the data in the other disks is safe.
  * If you accidentally delete some files in a disk, you can
    recover them.
  * The disks can have different sizes.
  * You can add disks at any time.
  * It doesn't lock-in your data. You can stop using SnapRAID at any
    time without the need to reformat or move data.
  * To access a file, only a single disk needs to spin, saving power and
    producing less noise.
 .
 The official site of SnapRAID is: http://www.snapraid.it/