get disk, partition, drive info in powershell...

Get-DiskPartitions.ps1

function Get-DiskPartitions {
  $partitions = Get-WmiObject -Class Win32_DiskDriveToDiskPartition | % {
    $dDep = $_.Dependent
    $p = Get-WmiObject -Class Win32_DiskPartition |  Where-Object { $_.Path.Path -eq $dDep }
    $d = Get-WmiObject -Class Win32_LogicalDiskToPartition | Where-Object { $_.Antecedent -in $dDep } | % { 
      $lDep = $_.Dependent
      Get-WmiObject -Class Win32_LogicalDisk | Where-Object { $_.Path.Path -in $lDep }
    }
    New-Object PSObject -Property @{
      Drive = if ($d -eq $null) { $null } else { $d.DeviceID };
      Partition = [Int]::Parse($p.Name.Split(",")[1].Replace(" Partition #",""));
      Disk = [Int]::Parse($p.Name.Split(",")[0].Replace("Disk #",""));
      Volume = if ($d -eq $null) { $null } else { $d.VolumeName }
    }
  }
  return ($partitions | Select Disk | Sort-Object -Property Disk -Unique) | % {
    $disk = $_.Disk;
    New-Object PSObject -Property @{
      Disk = $disk;
      Drives = ($partitions | Where-Object { $_.Disk -eq $disk }) | % {
        New-Object PSObject -Property @{
          Drive = $_.Drive;
          Partition = $_.Partition;
          Volume = $_.Volume;
        }
      }
    }
  }
}