Patent ID: 7334069
Filing Date: 2008-02-19
Classification: G06F

Abstract:
1. An array system comprising: a plurality of disk drives; and a control unit for controlling read/write of data requested by a plurality of host processors into the plurality of disk drives, using a plurality of logical volumes constituted by storage areas of the plurality of disk drives, and the control unit being controllable to allow or delay a read request or a write request sent from a host computer which has no exclusive control function, by controlling allowance or delay of the read request or the write request based on information received from the host computer with the read request or the write request, wherein, when the control unit receives multiple requests from different host processors for a logical storage area having a different size than a size of one of the logical volumes, the control unit controls to allow a first read request or write request of the multiple requests and controls to delay a second read request or write request of the multiple requests, and wherein, if the information received by the control unit from the host processor includes information as to the logical storage area, the control unit controls allowance or delay of the read request or the write request by using the logical storage area, but if the information received from the host processor does not include the information as to the logical storage area, the control unit controls allowance or delay of the read request or the write request by using the logical volumes.