PAVB,
1st I said that sounds good, so I do not say it's wrong or anything, just if u have a storage array, u do not really have a control over where the files are placed and u delegated that to the storage
2nd, about the backup strategy, it depends on the strategy if u will get some advantage on that or not.
So, again, I like this approach, just I I think it's better to say we do so, because we have that and that and that.
In the real world, the thinks rarely are just black and white