Patent ID: 7130144

Claim:
A disk array system comprising: a first disk controller circuit being coupled to at least one host computer and conducting to store data sent from said host computer to one or more storage regions based on Redundant Array of Independent Disks (RAID) procedure; a first fibre channel loop being coupled to said first disk controller circuit and being used to relay data sent from said first disk controller circuit to said storage regions; a plurality of disk drives being coupled to said first fibre channel loop and having said storage regions and storing said data sent from said first disk controller circuit; at least one power supply being coupled to said disk drives and supplying power to said disk drives; a first resource management circuit being coupled to said first disk controller circuit and collecting first information which indicates whether one or more of said disk drives are coupled to said first fibre channel loop and sending a notice of said first information to said first disk controller; a second disk controller circuit being coupled to said host computer and conducting to store data sent from said host computer to said storage regions based on said RAID procedure instead of said first disk controller circuit, if said first disk controller circuit fails; a second fibre channel loop being coupled to said second disk controller circuit and said disk drives end being used to relay data sent from said second disk controller circuit to said storage regions; a second resource management circuit being coupled to said second disk controller circuit and collecting second information which indicates whether one or more of said disk drives are coupled to said second fibre channel loop and sending a notice of said second information to said second disk controller; a first controller module having both said first controller circuit and said first resource management circuit on one module which is coupled to said disk drives; a second controller module having both said second controller circuit and said second resource management circuit on one module which is coupled to said disk drives; and a first housing having said first controller module, said second controller module, said power supply and a back plane, which is coupled to said first controller module, said second controller module and said power supply.