Users Guide

56 Using Mount Points in Hyper-V
Figure B-2. Typical VHD configuration on storage disk configured with a mount point
In Figure B-2, LUN A is not assigned a separate drive letter in the parent
partition, but is instead provisioned in the parent partition using the mount
point C:\StorageDisk1. For specific step-by-step information on configuring
mount points, refer to Microsoft documentation at
http://support.microsoft.com/kb/947021. Note that the use of mount points
is an advanced technique to provision storage, and careful consideration
should be provided before using it broadly.
In a Hyper-V Host Cluster environment, there are two additional
requirements prior to successfully deploying HA VMs hosted on mount
points:
• The Hyper-V and Failover Cluster Integration QFE (Microsoft KB951308
from
http://support.microsoft.com ) has to be applied on all Hyper-V nodes
as well as systems running the
Failover Cluster Management console. This
is required for the
High Availability wizard to detect that virtual machine
files are on a volume that is using a mount point and not a drive letter.
• If any one of the Hyper-V nodes has a volume using a mount point, it is
essential that all the Hyper-V nodes that are part of that Hyper-V Host
Cluster have a folder with the exact name so that a placeholder exists
when the storage disk fails over to any of the nodes. For example, in a
configuration similar to that in the Figure B-2, all nodes should have a
folder
C:\StorageDisk1 .