Which Dynamic Disk type provides fault tolerance by mirroring data?

• A. Mirrored (RAID-1).
• B. Stripped (RAID-0).
• C. Simple.
• D. Spanned.

Answer: (A)

Mirroring data across two disks provides fault tolerance. This Dynamic Disk type duplicates every write to a second disk so both disks contain the same data. If one disk fails, the other still has all the information and the system remains usable. This comes with the cost of needing extra disk capacity and can affect write performance because each write is performed on both disks, though reads can benefit by being served from either disk. This configuration is known as Mirrored (RAID-1) on Dynamic Disks. Other dynamic disk layouts either have no redundancy or use striping or concatenation without mirroring, so they don’t offer fault tolerance. Therefore, this is the correct choice.