use strict;
use Win32::OLE qw( in );

my @CAPABILITIES = (
  'Unknown', 'Other', 'Sequential Access', 'Random Access', 'Supports Writing',
  'Encryption', 'Compression', 'Supports Removable Media',
  'Manual Cleaning', 'Automatic Cleaning'
);
my $TotalSize = 0;
my $Machine = shift @ARGV || ".";
$Machine =~ s/^[\\\/]+//;
my $WMIServices = Win32::OLE->GetObject( "winmgmts:{impersonationLevel=impersonate,(security)}//$Machine" ) || die;

my (@drives, %serial);

my $DriveCollection = $WMIServices->InstancesOf( "Win32_DiskDrive" );
foreach my $Drive ( in( $DriveCollection ) ) {
  push @drives, $Drive;
}

my $PhysMedia = $WMIServices->InstancesOf( "Win32_PhysicalMedia" );

foreach my $Drive ( in( $PhysMedia ) ) {
  my $name = (split(/=/, $Drive->{Path_}->relpath))[1];
  $serial{eval $name} = $Drive->{SerialNumber};
}

foreach my $Drive (@drives) {
  print "Name: $Drive->{Name}\n";
  print "  Manufacturer: $Drive->{Manufacturer}\n";
  print "  Media Type: $Drive->{MediaType}\n";
  print "  Description: $Drive->{Description}\n";
  print "  Drive type: $Drive->{InterfaceType}\n";
  print "  Model: ", $Drive->{Model} || "Unknown", "\n";
  print "  Caption: $Drive->{Caption}\n";
  print "  SerialNumber: $serial{$Drive->{Name}}\n";
  print "  PNPDeviceID: $Drive->{PNPDeviceID}\n";
  print "  Signature: $Drive->{Signature}\n";
  print "  Partitions: $Drive->{Partitions}\n";
  print "  Size: ", FormatNumber( $Drive->{Size} ), " bytes\n";
  print "  Capabilities:\n";
  my $CapabilityList = $Drive->{Capabilities} || [];
  foreach my $Cap ( @{$CapabilityList }  ) {
    print "    $CAPABILITIES[$Cap]\n";
  }
  print "\n";
  $TotalSize += $Drive->{Size};
}
print "Total drive space: ", FormatNumber( $TotalSize ), " bytes\n";

sub FormatNumber {
    my($Number) = @_;
    while( $Number =~ s/^(-?\d+)(\d{3})/$1,$2/ ){};
    return( $Number );
}                           

__DATA__
F:\>wdd2.pl
Name: \\.\PHYSICALDRIVE0
  Manufacturer: (Standard disk drives)
  Media Type: Fixed hard disk media
  Description: Disk drive
  Drive type: IDE
  Model: Maxtor 6Y120P0
  Caption: Maxtor 6Y120P0
  SerialNumber: Y435RELE
  PNPDeviceID: IDE\DISKMAXTOR_6Y120P0__________________________YAR41BW0\345935334552454C202020202020202020202020
  Signature: 169678702
  Partitions: 3
  Size: 122,935,034,880 bytes
  Capabilities:
    Random Access
    Supports Writing

Total drive space: 122,935,034,880 bytes