Acronis True Image
In addition to the officially supported filesystems, Acronis True Image also provides raw sector backup and restore options for all other filesystems.  'Raw' mode provides support for a file system that is corrupt, or that is not officially supported, by capturing a complete image of all sectors on the disk.  This method results in a larger image file as it is not able to compress, resize, or selectively restore files on the unrecognized filesystem.