Re: Need a power-shell script to ..

Try something like this.

Get-Datacenter-NameMyDC|Get-VM|Get-HardDisk|
Select@{N="VM";E={$_.Parent.Name}},Name,CapacityGB,
@{N="Type";E={[string]::Join('/',($_.DiskType,$_.StorageFormat,$_.Persistence))}},
@{N="Comment";E={''*25}} |
Export-CsvC:\HD-report.csv-NoTypeInformation-UseCulture

I included a 25 character Comment field.