Patent ID: 6446161
Filing Date: 2002-09-03
Classification: G06F

Abstract:
A reallocating method, for use with a storage control unit connecting one data processor unit to a plurality of physical disk devices, for reallocating each of plural logical disk devices as objects of accesses from a data processor unit to the plurality of physical disk devices, said method comprising the steps of:allocating data of a logical disk device to at least one physical disk device such that the data is consecutively arranged in said at least one physical disk device; calculating an access frequency for each of the logical disk devices; selecting, according to results of said calculating step, a first logical disk device which has an access frequency exceeding a first predetermined value and a second logical disk device which has an access frequency equal to or less than a second predetermined value and which is allocated to a second physical disk device having a speed higher than a speed of a first physical disk device to which the first physical disk device is allocated; and reallocating the first logical disk device to the second physical disk device and the second logical disk device to the first physical disk device, by exchanging contents of the first physical disk device with contents of the second physical disk device.