Your network contains a server that runs Windows Server 2008 R2.

The server has two host bus adaptors (HBAs). Each HBA is attached to a different switch.

The network contains a Storage Area Network (SAN).

You need to configure the server to use multiple paths to access the SAN.

Which tool should you use?

A.
Diskpart

B.
Dism

C.
Mpclaim

D.
Netsh

Explanation:
Install MPIO on Windows Server 2008 R2

MPIO is an optional feature in Windows Server 2008 R2, and is not installed by default.
Install MPIO on Server Core installations of Windows Server 2008 R2

Because the Server Core installation of Windows Server 2008 R2 does not include the Server Manager interface, you must install MPIO by using a command prompt. Until you enable MPIO by using the DISM tool, you cannot use the mpclaim command.
Open a command prompt to run the following commands. After typing a command, press ENTER.

Enable MPIO:
Dism /online /enable-feature:MultipathIo

http://technet.microsoft.com/en-US/library/ee619752(v=ws.10).aspx

Using the MPclaim command-line tool
Multipath I/O can be managed by using the MPclaim command-line tool.
Note The command line is the only method of Multipath I/O configuration available on computers running a Server Core installation of Windows Server 2008.

Syntax of MPclaim
mpclaim restart_option install_switch device_switch device_hwid

MPclaim parameters
The following table describes the command parameters you can use with the MPclaim command to manage Multipath I/O by using a command line.

Source: http://technet.microsoft.com/en-us/library/cc725907.aspx