Patent ID: 7263584
Filing Date: 2007-08-28
Classification: G06F

Abstract:
1. A storage system comprising: a plurality of file access processing circuits receiving a file access request from an information processing apparatus via a network; a plurality of I/O processing circuits outputting to a plurality of storage devices I/O requests corresponding to said file access request; a disk controller executing input and output of data into and from the plurality of storage devices in response to the I/O requests sent from said I/O processing circuits, said storage devices corresponding to a plurality of logical volumes; and a cache memory temporarily storing data prior to being stored in said storage devices; wherein at least one logical volume of said logical volumes is assigned to each of the plurality of the file access processing circuits; wherein said at least one logical volume stores information that is necessary for the file access processing circuit which has not failed to take over processing of the file access processing circuit which has failed when failure occurs; and wherein when one of said file access processing circuits fails, another file access processing circuit processes the file access request sent from said information processing apparatus.