First, a Cr film and a CrOx film are deposited and patterned using an etchant including 8-12% Ce26, 10-20% NH3 and remaining ultra pure water to form a gate wire including a plurality of gate lines, a plurality of gate electrodes and a plurality of gate pads. The computer receives an offer for purchase of the item from a buyer, wherein the offer includes characteristics of a social media account of the buyer. The storage system stores information of address ranges of an integrated logical unit, in which each address range corresponds to the at least one first type storage medium and the at least one second type storage medium included in the integrated logical unit, and provides the information of address ranges of the integrated logical unit to the client computer.