# PowerShell - drive variable

Dinesh K just a moment. 1 answers, 0 views

Hello Stackoverflow users,

I am a noob at powershell and this is part of my 1st script I am creating :). I am lost on how I would run a script that is dependent on a drive. I have script that runs task on the d: drive but some hosts does not have a D: drive but has an F: drive instead. What is the best way of adding this variable into the script?

Sample of the script is below

mkdir -Force -Path D:\Apps\NetprobeNT\Auto-monitor
Copy-Item D:\Apps\NetprobeNT\selfannounce.xml -Destination D:\Apps\NetprobeNT\Auto-monitor -Force
$removecomment = Get-Content D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml$removecomment = $removecomment -replace "<!--<type>automonitor-windows</type>-->","" -replace "<!-- Autogenerated types -->","" -replace "<!--End of autogenerated types -->",""$removecomment | ?{$_.Trim() -ne ""}$removecomment | Out-File  D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml -Encoding default

[xml]$selfannounceXml = Get-Content -Path D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml$newCommentstart = $selfannounceXml.CreateComment('Autogenerated types')$startupNode = $selfannounceXml.netprobe.selfAnnounce.managedEntity.types$startupNode.InsertAfter($newCommentstart,$startupNode.LastChild)
$selfannounceXml.Save("D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml") #Get IIS application path Import-Module webadministration$a = Get-Website | Select-Object Name
$a | ForEach-Object {$_.name = $_.name.replace(" ","") } #Export file as .txt$a | Format-Table -HideTableHeaders | Out-File D:\Apps\NetprobeNT\Auto-monitor\Website.txt
$b = Get-Content -Path D:\Apps\NetprobeNT\Auto-monitor\Website.txt$b | ForEach {$_.TrimEnd()} | ? {$_.trim() -ne '' } > D:\Apps\NetprobeNT\Auto-monitor\Website.txt
$b = Get-Content -Path D:\Apps\NetprobeNT\Auto-monitor\Website.txt @(ForEach ($a in $b) {$a.Replace(' ', '')}) > D:\Apps\NetprobeNT\Auto-monitor\Website.txt

#Get XML and add IIS path to 'types'
#Stop-Service -DisplayName NetprobeNT_DES

[xml]$xmlSA = Get-Content D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml$b | ForEach-Object {
$tempchild =$xmlSA.CreateElement("type")
$tempchild.set_InnerText($_)
$newType =$xmlSA.netprobe.selfAnnounce.managedEntity.types.AppendChild($tempchild) } #$Newcommentstart =

$xmlSA.Save("D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml") [xml]$selfannounceXml = Get-Content -Path D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml
$newCommentstart =$selfannounceXml.CreateComment('End of Autogenerated types')
$startupNode =$selfannounceXml.netprobe.selfAnnounce.managedEntity.types
$startupNode.InsertAfter($newCommentstart, $startupNode.LastChild)$selfannounceXml.Save("D:\Apps\NetprobeNT\Auto-monitor\selfannounce.xml")

As you can see everything is dependent on D:\Apps.... but in some cases it might be F:\Apps..... How would I put some logic in or variable to know which drive is present? thank you for any help in advance.

Update:

From some help below, I can use the following method for now

$Path = "F:\Apps\NetprobeNT\"$PathExists = Test-Path $Path If ($PathExists -eq $True) {$DeviceID = "F:"}
Else
{
$DeviceID = "D:"} How could I do something similar to the script above that would scan all drives and test-path to determine the$DeviceID? Note - must work for PowerShell 2.0 (windows 2003 host).

Thanks Again.

Update 2 -

I think the best method is the following as it will cater for any drive but I can not get it working. I know I am making a simple mistake -

Get-WmiObject win32_logicaldisk -Filter "DriveType=3 AND DeviceID!='C:'" | Select DeviceID | Format-Table -HideTableHeaders > c:\DeviceID.txt -Force
$DeviceID = Get-Content C:\DeviceID.txt$DeviceID | ForEach {$_.TrimEnd()} | ? {$_.trim() -ne '' } > c:\DeviceID.txt

$DeviceID = Get-Content C:\DeviceID.txt$Path = "$_\Apps\NetprobeNT\"$PathExists = Test-Path $Path foreach ($DeviceID in $DeviceID) { If ($PathExists -eq $True) {$DeviceDrive = $DeviceID} Else {$DeviceDrive = "C:"}
}

I think the following line is the problem

$Path = "$_\Apps\NetprobeNT\"

Any ideas on to get this working?

Thank you

Avshalom 05/06/2016.

You can use WMI Filter, Filter only disk volumes which are not C Drive

$DeviceID = Get-WmiObject win32_logicaldisk -Filter "DriveType=3 AND DeviceID!='C:'" | Select DeviceID Then change the target: mkdir -Force -Path "$DeviceID\Apps\NetprobeNT\Auto-monitor"

*Also, it's best practice to use one variable and call it each time, more readable, and easier, like this:

$TargetPath = "$DeviceID\Apps\NetprobeNT\Auto-monitor"
mkdir -Force -Path \$TargetPath