The NTMS_LMIDINFORMATION structure defines the properties specific to a logical media object.

 typedef struct _NTMS_LMIDINFORMATION {
   NTMS_GUID MediaPool;
   DWORD dwNumberOfPartitions;
 } NTMS_LMIDINFORMATION;

MediaPool: The unique identifier of the media pool that contains the logical media.

dwNumberOfPartitions: The number of sides in the media object.