A method implemented in a computer infrastructure having computer executable code tangibly embodied on a computer readable medium being operable to determine at least one data center condition and determine or estimate a current energy cost. A CHF 61 receives a Read Capacity command from a new-type storage device 25. The brush assembly can be made of a resilient coil or a plurality of filamentary or lamellar elements, affixed to the support member. Processing means having a function of writing predetermined information into the nonvolatile memory is disposed in the apparatus body. The set of block members are supported on a self-supporting wall frame. Switching is made to a power-saving mode when a counter has timed the time information.