Patent ID: 6145067
Filing Date: 2000-11-07
Classification: G06F

Abstract:
A disk array apparatus including a plurality of physical disks forming a physical disk group which is logically divided into a plurality of unit areas, the unit areas being combined into a logical disk, comprising:a control section for controlling an access to said logical disk in accordance with an external request;a reconfiguration executing section for reconfiguring the logical disk in accordance with an external request;data copying means for copying data from a unit area as a reconfiguration source to a unit area as a reconfiguration destination when the logical disk is reconfigured;read means for reading out data from a unit area;write means for writing data in a unit area that is not being reconfigured; anddouble write means for writing data in both the unit area as the reconfiguration source and the unit area as the reconfiguration destination when the data is written in the unit area that is being reconfigured.