If its music/movies it's not that big an issue to get 1 corrupted file, on the other hand, corruption on critical work files could be a disaster.
I say RAID is fine for a media NAS box, but for critical business files, a more thorough backup strategy is required...
In that case I still wouldn't call it a backup. I'd just say that the array itself was failure-resistant enough that you've chosen not to maintain a backup.
If its music/movies it's not that big an issue to get 1 corrupted file, on the other hand, corruption on critical work files could be a disaster.
I say RAID is fine for a media NAS box, but for critical business files, a more thorough backup strategy is required...