VMWare PowerCLI Get DiskUsage of powered off vm's - powershell

Question

I'm creating a script that gets all vm's and shows the DiskSpace. THe Problem is, that if a vm is powered off, it won't show the uesed Space of a disk.
Here are two examples: First one with an VM that is powered on:
PowerCLI C:\> Get-VM sluwv0039
Name PowerState Num CPUs MemoryGB
---- ---------- -------- --------
sluwv0039 PoweredOn 2 4.000
PowerCLI C:\> $VM = Get-VM sluwv0039
PowerCLI C:\> $VM.guest.disks
CapacityGB FreeSpaceGB Path
---------- ----------- ----
49.997 5.417 C:\
Example two where the VM is powered off:
PowerCLI C:\> Get-VM sluwv0012
Name PowerState Num CPUs MemoryGB
---- ---------- -------- --------
sluwv0012 PoweredOff 4 8.000
PowerCLI C:\> $VM = Get-VM sluwv0012
PowerCLI C:\> $VM.guest.disks
PowerCLI C:\>
Note: The Last line is the output. There is no "CapacityGB" etc.

Answer 1

Correct, that property is reading from the guest file system to see how much space is left on the partition. In your case, the C:\ drive. If the VM is off, there's no way for PowerCLI to find that property.
Alternatively, you could look at the $vm.ExtensionData.Summary.Storage properties and do some rough conversions. Note: the output of those are in byte, so you'll want to convert them to GB. Example: $tempVM.ExtensionData.Summary.Storage.Committed / 1GB
It won't be exact, but it will be better than no output at all.

Answer 2

here is example of script to show vm specification:
Get-Vm | Select-Object Name,PowerState,VMHost,NumCPU,MemoryGB,ProvisionedSpaceGB,#{N="HostName";E={#($.guest.HostName)}},#{N="Gateway";E={#($.ExtensionData.Guest.IpStack.IpRouteConfig.IpRoute.Gateway.IpAddress[0])}},#{N="DNS";E={$.ExtensionData.Guest.IpStack.DnsConfig.IpAddress}},#{N="IPAddress";E={#($.guest.IPAddress -like "192.168.*")}},#{N="Nics";E={#($.guest.Nics)}},#{N="Datastore";E={#($ | Get-DataStore)}},#{N="Disks";E={#($.guest.Disks)}},Version,#{N="State";E={#($.guest.State)}},#{N="OS";E={#($_.guest.OSFullName)}}
the sample output is like this:
Name State VMHost NumCpu MemoryGB PowerState ProvisionedSpaceGB Version IPAddress HostName OS Nics Disks VMwareTools Gateway DNS
test Running 192.168.32.100 2 1 PoweredOn 43.1085147 v8 192.168.122.1 Elenoon Ubuntu Linux (64-bit) Network adapter 1:VM Network Network adapter 2:local : : Capacity:17167286272, FreeSpace:14212493312, Path:/ Capacity:15188623360, FreeSpace:15154872320, Path:/media/files Capacity:10724835328, FreeSpace:10672824320, Path:/var/log Capacity:973770752, FreeSpace:690139136, Path:/boot guestToolsRunning 127.0.0.1
hope to be useful ;)