Administrator Guide

• Classication Management
Multipath I/O (MPIO)
Microsoft Multipath I/O (MPIO) is a framework provided by Microsoft, which enables storage providers to develop multipath solutions that
contain the hardware-specic information. It is required to optimize connectivity with their storage arrays. These modules are called
Device-Specic Modules (DSMs). MPIO is protocol-independent and can be used with Fibre Channel, Internet SCSI (iSCSI), and Serial
Attached SCSI (SAS) interfaces in Windows Server OS.
MPIO provides the following features:
• High application availability through failover clustering
• High availability for storage arrays
• SAS disk compatibility
• Ability to perform MPIO tasks by using Windows PowerShell cmdlets
NOTE: To work with the DSM provided by Microsoft, storage must be SCSI Primary Commands-3 (SPC-3) compliant.
Managing devices on MPIO
About this task
To manage devices on MPIO:
Steps
1 In Server Manager, click Tools > MPIO.
The MPIO Properties window is displayed.
2 In the MPIO Devices tab, click Add, enter the Device hardware ID of the device you want to add MPIO support for, and then click OK.
3 The device hardware IDs are seen in the Discover Multi-Paths tab.
NOTE
: A device hardware ID is a combination of vendor’s name and a product string that matches the device ID that is
maintained by MPIO in its supported device list. The vendor and product IDs are provided by the storage provider, and
they are specic to each type of hardware.
4 In the DSM Install tab, type the DSM INF le and click Install or uninstall to install or Uninstall a DSM.
5 In the Conguration Snapshot tab, capture the snapshot of the current MPIO conguration on the system, specify a lename for the
information to be captured, and then click Capture.
Initial
conguration of your NAS system 13