The present invention generally provides a method and apparatus for supporting and transferring a substrate. The system may include at least one stationary air conditioner and at least one mobile assistant device that move with a predetermined management area and cooperates with the air conditioner. The communication of the patient data via the short-range wireless communication being within a predefined spectrum. The present invention prevents a power switch from gate-oxide breakdown lest noise margin, stabilization and performance of SRAM be affected. Access to the raw DSU by the storage user may be restricted to a specified region of the raw DSU, by defining an extent within the raw DSU mapping.