If we were dealing with system files / and actual operating system then I hazard to say we would be in a bit of a mess...
However if it is just data and not system files then no it would be fine... Though there may well be a security conflict on the files and folders after reinstating the data image. That is easily rectified though.
One thing I did neglect to ask is I am assuming you are not dealing with an actual operating system backup here ?
Andyrids - the whole thing - total backup and restore - OS, data, all. To be able to restore in an hour when the whole hard drive blows up.
I'm not in a position to reproduce that so can't really say.. on a serious note though I did read an article a while back where they were testing exactly what you had to do to a HDD to ensure even forensics could not recover the data the only result that I recall was incineration and even after that something like 30% of the data was still recoverable.
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