Checking Hard Drive Size (Local and Remote)

WMI can provide the raw data about hard drive size and free space. PowerShell then takes that information and provides user-friendly results like this:

 
PS C:\> # local
PS C:\> Get-HardDriveSize

DriveLetter Free(GB) Size(GB) Percent
----------- -------- -------- -------
C:             823,7    942,3    87,4



PS C:\> # remote
PS C:\> Get-HardDriveSize -ComputerName server2 -Credential server2\Tobias

DriveLetter Free(GB) Size(GB) Percent
----------- -------- -------- -------
C:              87,3    436,9      20
D:               5,3       25    21,3
 

Here is the code:

function Get-HardDriveSize
{
  param
  (
    $ComputerName,

    $Credential
  )

  # get calculated properties:
  $prop1 = @{
    Name = 'DriveLetter'
    Expression = { $_.DeviceID }
  }

  $prop2 = @{
    Name = 'Free(GB)'
    Expression = { [Math]::Round(($_.FreeSpace / 1GB),1) }
  }

  $prop3 = @{
    Name = 'Size(GB)'
    Expression = { [Math]::Round(($_.Size / 1GB),1) }
  }

  $prop4 = @{
    Name = 'Percent'
    Expression = { [Math]::Round(($_.Freespace * 100 / $_.Size),1) }
  }

  # get all hard drives
  Get-CimInstance -ClassName Win32_LogicalDisk @PSBoundParameters -Filter "DriveType=3" | 
  Select-Object -Property $prop1, $prop2, $prop3, $prop4

}

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