Patent ID: 6209060
Filing Date: 2001-03-27
Classification: G06F

Abstract:
A disk array device comprising:a logical disk consisting of an I/O device for storing data therein and an I/O device for storing therein redundant data prepared with the data;a lower device interface control section connected to a plurality of I/O devices constituting said logical disk for transferring data to and from the I/O devices;an upper device interface control section connected to an upper device as well as to said lower device interface control section for analyzing an operational instruction to said logical disk issued from said upper device and also for transferring data to and from said lower device interface control section; anda control unit for controlling said lower device interface control section and said upper device interface control section, wherein each of the I/O devices has a rewritable nonvolatile storage medium with a control program controlling the device itself and a version number of the control program stored therein, wherein said control unit comprises:a detecting unit for detecting that any of the plurality of I/O devices has been replaced, anda copying unit for transferring to a replaced I/O device detected by said detecting unit, the control program from a non-replaced one of the plurality of I/O devices.