A core cooling accessory includes a hand covering configured as a glove having a palm portion and a wrist portion. In the storage device controlling apparatus, the disk controller performs a replication management processing whereby data is also written into a second logical volume to store a copy of the data in the second logical volume, when the data is written into a first logical volume. The management server monitors, on the basis of the operation information obtained from each apparatus to be managed, the amount of consumption of a resource with respect to a predetermined unit set for a user of the apparatus to be managed or the group of apparatuses to be managed, and dynamically controls the operating condition of the apparatus to be managed. Then, for each segment received in the reception order, the sequence values of the received segment and of the segments received earlier in the reception order are compared in order to assign the received segment a classification identity as an in-order or out-of-order segment.