Get physical disk id and drive letters from management studio?
You can use glennberry scripts..

 SELECT DISTINCT vs.volume_mount_point, 
vs.file_system_type, 
    vs.logical_volume_name,
 CONVERT(DECIMAL(18,2),vs.total_bytes/1073741824.0) AS [Total Size (GB)],
    CONVERT(DECIMAL(18,2),vs.available_bytes/1073741824.0) AS [Available Size (GB)],  
    CAST(CAST(vs.available_bytes AS FLOAT)/ CAST(vs.total_bytes AS FLOAT) AS DECIMAL(18,2)) * 100 AS [Space Free %] 
    FROM sys.master_files AS f WITH (NOLOCK)
    CROSS APPLY sys.dm_os_volume_stats(f.database_id, f.[file_id]) AS vs OPTION (RECOMPILE);


Below is the sample output,is this what you need..