When attempting to filter the results of Get-PSDrive you might notice that filtering by using Where-Object for the Provider property does not work as expected. For example the following code will not yield the expected results and will in fact not return any drives:
Get-PSDRive | Where-Object {$_.Provider -eq 'FileSystem'} |
So let’s have a look at the reason for this, if we take a look at the Provider property of the output and what it contains:
PS C:\Users\JaapBrasser (Get-PSDrive).Provider.GetType() IsPublic IsSerial Name BaseType -------- -------- ---- -------- True True Object[] System.Array PS C:\Users\JaapBrasser (Get-PSDrive).Provider | Get-Member -MemberType Property TypeName: System.Management.Automation.ProviderInfo Name MemberType Definition ---- ---------- ---------- Capabilities Property System.Management.Automation.Provider.ProviderCapabil... Description Property string Description {get;set;} Drives Property System.Collections.ObjectModel.Collection[System.Management... HelpFile Property string HelpFile {get;} Home Property string Home {get;set;} ImplementingType Property type ImplementingType {get;} Module Property psmoduleinfo Module {get;} ModuleName Property string ModuleName {get;} Name Property string Name {get;} PSSnapIn Property System.Management.Automation.PSSnapInInfo PSSnapIn {get;} |
So in order to correctly use Where-Object here, the comparison should be made to Provider.Name property instead, here is what the successful Where-Object filter script looks like:
Get-PSDRive | Where-Object {$_.Provider.Name -eq 'FileSystem'} |
An easier and more correct form of only listing the FileSystem drives on your system would be by using the -PSProvider parameter of the Get-PSDrive cmdlet. By using this we can avoid using the pipeline and simplify the code even further:
Get-PSDRive -PSProvider FileSystem |
