My task is to do a Windows Server 2008 R2 Standard re-installation on a DELL Server. All data will be migrated to the new Installation. The server has only two HDD's in RAID 1.
To have a backup solution, I will remove one of the Disks and install the new OS on one of the disks only. If everything goes smoothly I will install the spear HDD and rebuild the array.
So, how the RAID 1 will be rebuild in this case? Is there a danger of writing the old OS data on top of the new one? How do I avoid this?