find and delete unattached managed disks.ps1

# !!! Make sure you don't delete unintentionally disks you might need
# Set deleteUnattachedDisks=1 if you want to delete unattached Managed Disks
# Set deleteUnattachedDisks=0 if you want to see the Id of the unattached Managed Disks
$deleteUnattachedDisks=0
$managedDisks = Get-AzDisk
$k=0
$l=0
foreach ($md in $managedDisks) {
    # ManagedBy property stores the Id of the VM to which Managed Disk is attached to
    # If ManagedBy property is $null then it means that the Managed Disk is not attached to a VM
    if($md.ManagedBy -eq $null){
        $k+=1
        if($deleteUnattachedDisks -eq 1){
            Write-Host "Deleting unattached Managed Disk with Id: $($md.Id)"
            $md | Remove-AzDisk -Force
            Write-Host "Deleted unattached Managed Disk with Id: $($md.Id) "
            $l+=1
        }else{
            $md.Id
        }
    }
 }
 Write-Host "Unmanaged disks found: " $k "/ deleted: " $l