Patent ID: 8001343
Filing Date: 2011-08-16
Classification: G06F,Y02D

Abstract:
1. A storage device, which has a first storage unit for storing data transmitted from an upper device over a long time and a second storage unit for temporarily storing data including part of the data stored in the first storage unit, comprising: a storage capacity monitoring unit to monitor a storage amount of data stored in a plurality of storage units, to configure the second storage unit, and to detect a storage unit the storage amount of which is a predetermined ratio or higher; a power-on unit to determine a storage unit to be used next to the storage unit detected by the storage capacity monitoring unit, using priorities of the storage units, the priorities of which are determined to increase the cooling efficiency to the highest in accordance with the hardware configuration of the storage unit, and to power on a storage unit by issuing a power-on instruction to the determined storage unit; an access state monitoring unit to monitor a state of accesses from the upper device to the plurality of storage units, to configure the second storage unit, and to detect a storage unit to which no access is made over a time period; and a power-off unit to power off storage units by issuing a power-off instruction to the storage unit which stores no data, and the storage unit which stores data up to its maximum storage capacity among storage units detected by the access state monitoring unit.