backup/swap HD?

Redhat 7.3

Is there are program/script that will take a daily mirror backup of drive A to Drive B? If Drive A fails, you can install Drive B into A position.
Restart server and away you go! Can it be done?
Right now we have a mirror backup but if the A drive, if it goes out we must do a fresh install of the O/S, hsphere and copy files over.
I know this has been discussed many times but we need to resolve this.
Thanks

 

 

 

 

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