Perl is just so cool (well, thanks to all those nice modules! :) ).
Anyway, since I havent been lazy waiting for a solution from you monks, Ive managed to do this:

use Win32API::File qw /:Func :IOCTL_DISK_ :MEDIA_TYPE/;
use Data::Dumper;

use strict;
use warnings;
use diagnostics;

my $sDosDeviceName = [];
my $osTargetPath;
my @devices = Win32API::File::QueryDosDevice($sDosDeviceName, $osTarge
+tPath, []) or  die "Can't open: $^E\n";

print Dumper($sDosDeviceName);

#foreach (@devices) {
#    print $_ . "\n";
#}

my $hObject = createFile( "//./PhysicalDrive3", "r", "rw")
                            or  die "Can't open: $^E\n";

#Usage: Win32API::File::DeviceIoControl(hDevice, uIoControlCode, pInBu
+f, lInBuf, opOutBuf, lOutBuf, olRetBytes, pOverlapped)
my $opOutBuf;
my $olRetBytes;
Win32API::File::DeviceIoControl($hObject, IOCTL_DISK_GET_DRIVE_GEOMETR
+Y, [], 0, $opOutBuf, [], $olRetBytes, []);

# Calculate the number of DISK_GEOMETRY structures returned:
my $cStructs= length($opOutBuf)/(4+4+4+4+4+4);
my @fields= unpack( "L l I L L L" x $cStructs, $opOutBuf );

my( @ucCylsLow, @ivcCylsHigh, @uMediaType, @uTracksPerCyl, @uSectsPerT
+rack, @uBytesPerSect ) = ();

print Dumper(@fields);

my $ucCylsLow = shift @fields;
my $ivcCylsHigh = shift @fields;
my $uMediaType = shift @fields;
my $uTracksPerCyl = shift @fields;
my $uSectsPerTrack = shift @fields;
my $uBytesPerSect = shift @fields;

if ($uMediaType eq FixedMedia) {
    print "FixedMedia";
}
[download]

Comments?

Well, so far it seems good (although I cant make QueryDosDevice to work!)... But next step? To actually read sector by sector?

(I've had some help from http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/calling_deviceiocontrol.asp )

Thanks,
Ace