Hi cluster scripting fans,
I often find myself looking for the drive letter(s) for a physical disk resource in a PowerShell console/script. After a bit of investigation, here is a way to do that using Cluster WMI through PowerShell:
$DiskResourceName = "Cluster Disk 2"
$DiskResource = gwmi MSCluster_Resource -Namespace root/mscluster | ?{ $_.Name -eq $DiskResourceName }
$Disk = gwmi -Namespace root/mscluster -Query "Associators of {$DiskResource} Where ResultClass=MSCluster_Disk"
$Partition = gwmi -Namespace root/mscluster -Query "Associators of {$Disk} Where ResultClass=MSCluster_DiskPartition"
After you run those CMDlets in your PowerShell window on a cluster node, the $Partition variable will contain a MSCluster_DiskPartition WMI object per volume on the physical disk resource you specified with $DiskResourceName.
Here is an example when I run this against a physical disk resource with one partition:
$Partition | select Path
Path
----
L:
… and here with two partitions:
PS G:Windowssystem32> $Partition | select Path
Path
----
J:
Q:
Enjoy!
Ahmed Bisht
Senior Program Manager
Clustering & High-Availability
Microsoft
