I have to admit that a little over a year ago, the only redundancy I have with important family files was by folders copied and pasted to different drives in the same system, and the yearly "merging" of my digital camera folder with my parents. Basically if one drive took a turn for the worse, something else would be there but maybe not up-to-date. About a year ago I turned back to using a server, had RAID1 over two volumes (1TB and 2TB) and had some parity in my home, but didnt really work on the family setup. Well that is until about a month ago.
After getting very intimate with the Synology NAS units, convincing my father to get one, and having one at home and work, I have setup a near disaster-proof backup/mirroring plan. Right now this is the setup we are rolling with, with some *secure* backups coming in place shortly.
My Home NAS > 4 x 2TB RAID5
Parents NAS > 2 x 2TB RAID1
Work NAS > 4 x 1TB RAID5
Each of these units are accessible through the net using DynDNS, all are kept updated so software is matched across each model. Each NAS has one volume, with different stuff in various folders. Main ones are listed below:
Digital Camera Pictures (obvious) ~120GB
Work Stuff (StorageReview pre/post-review images, draft documents, test data, everything vitally important) ~10GB
Home Stuff ( Firefox backups, tax documents, backup of licenses, etc) - 2GB
Family Stuff (Budgets, father's work stuff, Outlook backups, misc crap) - 1GB
Right now we have scheduled backups of each of the folders except my home stuff for now. Using incremental block-level backups, since a lot of the data stays the same each time, just with changes or additions. Backups are set weekly on some stuff, with large items set monthly or manual.
Plan going forward will be a bi-yearly copy of all those folders to a notebook drive that will get placed in a safety deposit box. While not tape backups, I think we are doing pretty good. Data is mirrored across multiple states, four different locations, nothing in flood zones, and all NASes are on battery backups. Now media is mirrored between systems and servers locally, but not across multiple servers. It just falls into the category of not being worth it considering its size, ease of reacquiring, and multiple forms of local backups (the ipod counts!).
So what are you guys doing?