Contains a map of the physical blocks that are being used, including what physical devices the blocks are on.
typedef struct zPhysicalExtent_s { QUAD length; QUAD logicalOffset; QUAD poolOffset; struct { QUAD offset; LONG deviceID; LONG padding; } physical; } zPhysicalExtent_s;
Specifies the length of the physical extent in bytes.
Specifies the logical offset in the file in bytes.
Specifies the logical offset in the pool in bytes.
Specifies the physical offset in bytes, relative to the device identified by deviceID.
Specifies the device ID used by the Media Manager to identify the physical device where the extent resides.