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PowerVault™ MD32X0, MD32X0i, and MD36X0i Series of Storage Arrays: Implementing Hyper-V

Virtual Storage Configuration

Figure 6.

Size each logical unit number (LUN) to support the target VHD. To avoid warning messages generated

by the parent partition regarding the physical disk running out of capacity, allocate an additional 200

MB to the LUN. Leave this additional 200 MB as empty space on the virtual disk.

Considerations When Using Pass-through Physical Disks or VHDs

Keep the following considerations in mind when using pass-through physical disks or VHDs:

•

Pass-through physical disks offer slightly higher performance than VHDs and support

virtual disk sizes greater than 2 TB. However, pass-through physical disks do not

support VSS-based backup or checkpoints. VSS-based backup with hardware providers

works as long as the backup is initiated from the parent. Inside the VM, only software-

based VSS backup is supported.

•

VHDs

support the ability to export

•

VHDs support

•

Both VHDs and pass-through physical disks can be used in clustered environments.

•

If you are booting from a pass-through physical disk, store the VM files in a different

location.

•

For each VM, create a separate pass-through physical disk. You cannot share a pass-

through physical disk for two VMs.

•

The physical layout of the pass-through physical disk is the same as for any physical

server.

Note: For the highest performance, use pass-through physical disks, but only as data devices.

If you need optimal flexibility, assign fixed-size VHDs.

For more information about how to maximize performance for different applications on the Dell

PowerVault MD32X0, MD32X0i, and MD36X0i storage arrays, go to this website:

http://www.dell.com/downloads/global/products/pvaul/en/pvault_MD3200_whitepaper.pdf

Note: The configuration of your physical disk layout for performance on the Dell PowerVault

MD32X0, MD32X0i, or MD36X0i storage array depends on the application requirements

of your VM (child partition), not on the Hyper-V parent server.

the drive to another

checkpoints.

parent server.

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