Patent ID: 8245187
Filing Date: 2012-08-14
Classification: G06F

Abstract:
1. A disk array apparatus comprising: a plurality of disk devices arranged for providing redundancy; a disk array control device for executing a data write command or a data read command issued from a host computer to each of the disk devices; a disk controller for controlling each of the disk devices independently in response to a command issued from the disk array control device; wherein the disk array control device comprises: a firmware update controller for designating a target disk device to be updated based on a content of a firmware update command for the disk device and controlling a firmware update for the designated disk device; a degenerate state setting controller for disconnecting the disk device designated by the firmware update controller from the host computer temporarily, and setting the disk device as being in a temporary degenerate state; a write/read execution processor for, when the data write command or the data read command for the disk device being in the temporary degenerate state is issued from the host computer, designating a disk device other than the disk device being in the temporary degenerate state to make a command issued from the host computer be performed with using redundancy of each disk device.