Description: This table represents mappings between logical drives and logical or physical drive segments. Each entry in this table describes *one* such mapping. A logical drive may be composed of one, *or more*, such mappings. A segment may be a part of a physical or logical drive or, in the degenerate case, the entire drive may be one segment. The table also contains two fields, namely: (a) 'Parent Drive' a unique index into the Mass Store Logical Drives Table describing the logical drive involved in the mapping,