Backing up huge amounts of critical data on a local network

Backing up huge amounts of critical data on a local network My father is a wedding photographer who produces around 50GB of data a week that needs backing up. He wants to guarantee the data he's backing up for at least a year.
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Guest [Entry]

"I still think a very reliable off-the-shelf NAS would be the best solution. Although NAS's are usually Linux/BSD based, they provide a friendly web interface and hide much of the unnecessary detail.

If you do opt to build, a full Linux install may require more maintenance than a professional photographer would want to worry about. I would recommend either Windows Home Server or FreeNAS.

Superuser has a couple recommendation threads for both options:
Any recommendations on a NAS for a home-super-user?
superuser.com/questions/4893/homemade-diy-nas-solution

Finally, my own recommendation: I've used a D-Link DNS-323 with two 1TB drives for 1 year and have not had a problem."

Guest [Entry]

"50 gygs a week? Does he store all his images in .RAW ?

50 gygs times 52 weeks = 2.6 terra bytes each year...

First of all, how much do you want to spend?
Second, RAID 1 is very expensive when you have to backup large ammounts of data. It duplicates the ammount of drives needed for the job.

RAID 10 or RAID 5 will do the trick. However, for him to be able to save one year of work, he needs in excess of 3 terrabytes... Which will be a lot to handle... I best suggest he compresses it a bit when backup up the data..."