Should I use backup and restore?

Hi,

My domainserver (Windows Server 2008 R2) is currently running on RAID 1 with 2 disks.
Iam going to replace my old RAID card and disk with a RAID card that can run RAID 5 and 3 new disks.

After this Iam also installing Exchange 2013 on the server.

My question is:
Is the easiest/smartest way to get the same domain settings and server settings to backup the whole serevr/domain on a external disk and restore it after I made the change of RAID/Disks?
When that is done just install the Exchange.

Thanks!