In Pictures: 10 excellent new features in Windows ...
If you've ever had a disk fail in a RAID array, you know that a disk rebuild can take many hours. And with more and more deployments of really large physical disks, the amount of time required to rebuild a drive will only get longer. Microsoft addressed the issue of lengthy CHKDSK checks in Windows Server 2012, which greatly reduced the time required to scan and repair a single disk. Windows Server 2012 R2 adds the ability to perform a parallel rebuild of a failed Storage Spaces drive, reducing the amount of time required by an order of magnitude. Demonstrations at TechEd showed a rebuild of a 3TB disk taking less than an hour.
In Pictures: 10 excellent new features in Windows Server 2012 R2