snapraid

SnapRAID is a backup program for disk arrays. It stores parity
information of your data and recovers from up to six disk failures.

SnapRAID is targeted for a home media server, where you have a lot
of large files which rarely change.

Features:
- All your data is hashed to ensure data integrity and avoid silent
  corruption.
- If the disk failures 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.
- You can use disks of different sizes.
- You can add disks at any time.
- It does not lock-in your data. You can stop using SnapRAID at any
  time without the need to reformat or move data.

Requirements:
- None

Configuration:
Before using SnapRAID, you must create a configuration file.
A template is provided at:
- /etc/snapraid.conf.new

Copy this to /etc/snapraid.conf and edit it to define your data
and parity disks.

Note:
This package does not include the snapraid-daemon. If you wish to
automate sync and scrub tasks with a Web UI, you should also
install the snapraid-daemon package.