I've been using BackupPC on a Linux box for years. First with RAID5 and now with RAID1, using ssh+rsync I can backup my Linux and OSX systems and have access to

I've been using BackupPC on a Linux box for years. First with RAID5 and now with RAID1, using ssh+rsync I can backup my Linux and OSX systems and have access to older backups via the web interface. For totally irreplaceable items I also back up a subset to Glacier.