You install Windows Essential Business Server 2008 on your company’s network. You want to provide fault tolerance for the data stored on the Messaging Server.
Which two types of dynamic volumes can you use for this purpose? (Choose two. Each correct answer presents a unique solution.)

A.
simple volumes

B.
spanned volumes

C.
striped or RAID-0 volumes

D.
mirrored or RAID-1 volumes

E.
RAID-5 volumes

Explanation:
You can use mirrored or RAID-1 volumes and RAID-5 volumes for fault tolerance. Dynamic disks provide features that are not provided by basic disks, including volumes that span multiple disks and volumes that provide fault tolerance. There are five types of dynamic volumes: simple, spanned, striped (RAID-0), mirrored (RAID-1), and RAID 5. Among these, only mirrored (RAID-1) volumes and RAID-5 volumes provide fault tolerance.

To create dynamic volumes, you must first change basic disks to dynamic disks. To do this, you can either use the Disk Management snap-in or the Diskpartexe utility.

You should not use simple volumes, spanned volumes, or striped volumes because they do not provide fault tolerance. A simple volume is a portion of a physical disk that provides dynamic storage, equivalent to primary partitions in Windows NT 4.0 or earlier. When you expand a simple volume to one or more dynamic disks on the same computer, it becomes a spanned volume. Therefore, spanned volumes combine areas of unallocated space from multiple disks into one logical volume, allowing you to use all of the space and all drive letters on a multiple-disk system more efficiently.

Striped volumes are created by combining areas of free space on two or more disks into one logical volume. Striped volumes use RAID 0, which stripes data across multiple disks. Striped volumes cannot be extended or mirrored, and do not offer fault tolerance. If one of the disks in the striped volume fails, the entire volume fails.