+/**\r
+ Return offset + length of a given indirect Allocation Descriptor (AED).\r
+\r
+ @param[in] BlockIo BlockIo interface.\r
+ @param[in] DiskIo DiskIo interface.\r
+ @param[in] Volume Volume information pointer.\r
+ @param[in] ParentIcb Long Allocation Descriptor pointer.\r
+ @param[in] RecordingFlags Flag to indicate the type of descriptor.\r
+ @param[in] Ad Allocation Descriptor pointer.\r
+ @param[out] Offset Offset of a given indirect Allocation\r
+ Descriptor.\r
+ @param[out] Length Length of a given indirect Allocation\r
+ Descriptor.\r
+\r
+ @retval EFI_SUCCESS The offset and length were returned.\r
+ @retval EFI_OUT_OF_RESOURCES The offset and length were not returned due\r
+ to lack of resources.\r
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
+ @retval other The offset and length were not returned.\r
+\r
+**/\r