Total Size of disks for a specific VM – “One-liner Wednesdays”

Here is a one-liner to get the sum of all disks associated to a specific VM in GB.

(Get-VM -name YOURVMNAME | Get-HardDisk | Measure-Object -Property CapacityKB -Sum).sum/(1024*1024)

Reference:
VMware PowerCLI Documentation
Microsoft PowerShell Documentation

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