How should we back-up our media files for our production studio We've had a video production studio for about 6 months, and we're revisiting how we should back-up/archive our client files and in general what our workflow should be with about a 8K limit on hardware.  We've sketched out a couple options for what hardware and procedures we're using.
Here is one:

Transfer RAW footage (we're shooting DSLR) to portable bus
powered HD
Import RAW footage into FCPX using Ext. Drive for
Scratch Disk (here we have RAW footage and FCPX project files
separated) Step
Delete SD Cards

EDIT Footage

Move FCP Projects files to RAID &amp; Delete bus powered HD that had raw footage
Step

Delete Scratch Disks



Here is possibly another option:

Transfer RAW footage to Scratch Drives
Copy RAW Footage to RAID
Delete SD Cards

EDIT Footage Step

Move FCP Projects files to RAID
Delete Scratch Disks
My process is always to start from the recording media, move the files from recording media to a 12TB external RAID5 array with a utility that verifies the integrity of the transfer.  This is my long term working archive.  

While I don't do this at this time, I'd recommend making periodic off-site backups of this array (either to a cloned array or to tape) to guard against loss of the entire RAID array.

For actually working with the assets, I copy (not move) the files to an internal scratch SSD RAID0 array.  Upon completion or archiving of a project, I move only the project files and any newly created files that need to be stored to the RAID5 archive.  I then rename my scratch folder, verify the project works when loaded on the archive array and then delete the renamed folder (which should only contain copies of the master source files.)

This protects against any corruption of original source files while editing and also minimizes the amount of data that I have to move off of the scratch disk.