This works for CD-ROMs.

use Win32::OLE ();

my $computer = '.';

my $obj = Win32::OLE->GetObject("winmgmts:\\\\$computer\\root\\cimv2")
or die("$^E\n");

my $devices = $obj->ExecQuery("
    SELECT *
      FROM Win32_CDROMDrive
");

foreach my $device (Win32::OLE::in $devices) {
   print
      $device->{ DeviceID    }, $/,
      $device->{ Description }, $/,
      $device->{ Name        }, $/;
}
[download]

Maybe this works for SCSI devices? (I don't have any to use for testing.)

use Win32::OLE ();

my $computer = '.';

my $obj = Win32::OLE->GetObject("winmgmts:\\\\$computer\\root\\cimv2")
or die("$^E\n");

my $devices = $obj->ExecQuery("
    SELECT *
      FROM Win32_SCSIControllerDevice
");

foreach my $device (Win32::OLE::in $devices) {
   my $dependant = $device->{Dependent};

   print
      $dependant->{ DeviceID    }, $/,
      $dependant->{ Description }, $/,
      $dependant->{ Name        }, $/;
}
[download]

References:
The Win32_CDROMDrive class ($device in first snippet)
The Win32_SCSIControllerDevice class ($device in second snippet)
The Win32_SCSIController class (might be of interest)
The CIM_LogicalDevice class ($dependant)

I hope this gives you a starting point.

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