• Clonezilla
  Features of Clonezilla Free (GPL) Software. Filesystem supported: ext2, ext3, reiserfs, xfs, jfs of GNU/Linux, and FAT, NTFS of MS Windows. Therefore you can clone GNU/Linux or MS windows. For other file system, Clonezilla uses dd to dump the whole partition. LVM2 (LVM version 1 is not) under GNU/Linux is supported. Multicast is supported in PXEBoot Clonezilla, which is suitable for massively clone. You can also remotely use it to save or restore a bunch of computers if PXE and Wake-on-LAN are supported in your clients. Based on Partimage, ntfsclone and dd to clone partition. However, clonezilla, containing some other programs, can save and restore not only partitions, but also a whole disk. If file system is supported (ext2, ext3, reiserfs, xfs, jfs, fa...
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• Main Page - btrfs Wiki
  Btrfs is a new copy on write filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration. Initially developed by Oracle, Btrfs is licensed under the GPL and open for contribution from anyone. Linux has a wealth of filesystems to choose from, but we are facing a number of challenges with scaling to the large storage subsystems that are becoming common in today's data centers. Filesystems need to scale in their ability to address and manage large storage, and also in their ability to detect, repair and tolerate errors in the data stored on disk.
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• rsnapshot
  rsnapshot is a filesystem snapshot utility for making backups of local and remote systems. Using rsync and hard links, it is possible to keep multiple, full backups instantly available. The disk space required is just a little more than the space of one full backup, plus incrementals. Depending on your configuration, it is quite possible to set up in just a few minutes. Files can be restored by the users who own them, without the root user getting involved.
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• The HAMMER Filesystem
  The HAMMER filesystem is a new addition to DragonFly. Being a brand-new filesystem we consider HAMMER to be in an early Beta state as of the 2.0 release, and expect it to become production-ready by the end of 2008. All major features except the mirroring are quite well tested as-of the release. The mirroring was the last big-ticket item to go in prior to the 2.0 release and should be considered more in a late-alpha light.
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