Detect GPT and MBR partitions with Powershell

Question

Is there a way to tell if a disk has a GPT or an MBR partition with powershell?

Answer 1

No. PowerShell does not have any native built-in commands for this. PowerShell, as the name suggests, is a shell. It comes with a good set of useful, generic cmdlets but specialization like this is left to external native commands (like diskpart), modules and/or snapins.

Since you're always going to find diskpart.exe where you find powershell, use that.

-Oisin

Answer 2

Using WMI

gwmi -query "Select * from Win32_DiskPartition WHERE Index = 0" | Select-Object DiskIndex, @{Name="GPT";Expression={$_.Type.StartsWith("GPT")}}

Using Diskpart

$a = "list disk" | diskpart
$m = [String]::Join("`n", $a) | Select-String -Pattern "Disk (\d+).{43}(.)" -AllMatches
$m.Matches | Select-Object @{Name="DiskIndex";Expression={$_.Groups[1].Value}}, @{Name="GPT";Expression={$_.Groups[2].Value -eq "*"}}