Detect mapped drive path and disconnect if exists

Question

_{Tuesday, March 4, 2014 7:37 PM}

Hello!

My issue is that a former admin somehow managed to get a mapped drive onto several hundred machines. The user under which this mapped drive was created is causing us a huge headache. What I'm looking to do is to write a script that basically looks at the path of the mapped drives, and if a drive is mapped to a certain location, disconnect it.

For instance:

Z is mapped to \server01\share01

If Z is indeed mapped to \server01\share01 then disconnect it. If drive Z exists, but is not mapped to \server01\share01 then leave it alone.

I came across the Test-Path and Get-PSDrive commands, but I couldn't figure out how to set the Root from Get-PSDrive as a variable, or the Providername from the WMI equivalent.

All replies (12)

_{Tuesday, March 4, 2014 8:00 PM ✅Answered}

Hi,

Give this a try:

Get-PSDrive | ForEach {

    If ( $_.DisplayRoot -eq '\\server01\share01' ) {
    
        Remove-PSDrive -Name $_.Name -WhatIf

    }

}

This won't actually remove anything for the time being. If you're happy with the results, remove the -WhatIf switch and rerun the script.

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_{Tuesday, March 4, 2014 8:12 PM}

Hmmm.

I mapped a drive to the location in question, changed the location in the script and ran it. Getting a blank output.

_{Tuesday, March 4, 2014 8:15 PM}

If you type Get-PSDrive by itself, do you see \server01\share01 appear in the Root column? If not, the code above won't detect anything.

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_{Tuesday, March 4, 2014 8:22 PM}

Hi,

Give this a try:

Get-PSDrive | ForEach {

    If ( $_.DisplayRoot -eq '\\server01\share01' ) {
    
        Remove-PSDrive -Name $_.Name -WhatIf

    }

}

This won't actually remove anything for the time being. If you're happy with the results, remove the -WhatIf switch and rerun the script.

Don't retire TechNet! - (Don't give up yet - 12,700+ strong and growing)

DisplayRoot? Did you mean Root? Although DisplayRoot is a property, it's blank for me as well.

_{Tuesday, March 4, 2014 8:24 PM}

Looks like I needed to relaunch ISE for whatever reason.  It does indeed give me an output warning for deleting the drive.

_{Tuesday, March 4, 2014 8:26 PM}

I used a simple If statement.

If ((Get-PSDrive).Name -eq 'Z' -and (Get-PSDrive).Root -eq '\\server01\share01') {
    Remove-PSDrive -Name 'Z'
}

_{Tuesday, March 4, 2014 8:35 PM}

DisplayRoot? Did you mean Root? Although DisplayRoot is a property, it's blank for me as well

Nope, DisplayRoot is what I was after. Type Get-PSDrive and find something that shows up with a UNC path. Then do Get-PSDrive x | Select *. You'll see DisplayRoot shown.

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_{Tuesday, March 4, 2014 8:37 PM}

Little off topic, but where do I find resources on items such as this?  I knew there was a way to isolate the "Root" aspect of what Get-PSDrive returns, but I had no idea where to find out how to do that. Any preferred training materials?

_{Tuesday, March 4, 2014 8:40 PM}

Not off topic at all. There are some good resources available online, but I've always found that a physical book is the most helpful. There's plenty of them on the market now.

Here's a few links that you might find helpful:

http://technet.microsoft.com/en-us/scriptcenter/dd793612.aspx (Microsoft learning resources, great place to start)

http://gallery.technet.microsoft.com/scriptcenter (Script repository - lots of good examples to look at and build from)

http://ss64.com/ps/ (My favorite command reference)

http://powershell.com/cs/blogs/ebookv2/default.aspx (Free ebook)

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_{Tuesday, March 4, 2014 8:43 PM}

Thanks for the information, Mike. I'm still not seeing it, but I'll continue working with it until I do (or until I move onto something different).

_{Tuesday, March 4, 2014 8:47 PM}

Cheers, here's an example from my session:

PS C:\> Get-PSDrive v | select *


Used            : 216021852160
Free            : 3730027581440
CurrentLocation : 
Name            : V
Provider        : Microsoft.PowerShell.Core\FileSystem
Root            : V:\
Description     : 
Credential      : System.Management.Automation.PSCredential
DisplayRoot     : \\serverName\shareName

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_{Tuesday, March 4, 2014 9:02 PM}

I was running it on my own machine expecting some form of output, but I totally forgot to map the drive on my own machine first. I then closed/opened ISE again and was able to get output.