Question

Im trying to find every drive letter that isnt “C,E,L,S,T,W” on a windows 2008 server. Can anyone tell me the fault in my logic or how i can do this please?

[char[]]”CELSTW” | Where-Object {!(Get-PSDrive $_ )} 

Answer 1

You are starting out with a list of drive letters you don’t want (CELSTW) and outputting the ones that don’t exist as a psdrive.

What you want is to start with a list of all PSDrives and filter them out where they match the ones you don’t want:

Get-PSDrive | Where-Object { [char[]]"CELSTW" -notcontains $_.Name }

Although that is going to give you a bunch of other PSDrive types. You probably also want to filter it for the FileSystem provider:

 Get-PSDrive | Where-Object { [char[]]"CELSTW" -notcontains $_.Name -AND $_.Provider.Name -eq "FileSystem"}