Patent ID: 7478231
Filing Date: 2009-01-13
Classification: G06F,H04L

Abstract:
1. A disk storage system comprising: a plurality of ports, each configured to receive data from a computer; a plurality of storage regions; a processor operative to process I/O requests received at said plurality of ports to store data to said storage regions and to retrieve data from said storage regions; a control unit comprising said plurality of ports and said processor; and a plurality of disk storage devices which comprise said plurality of storage regions, said processor further being operative to delay processing of an I/O request received at a first port by an amount of time depending on a level of I/O activity at a second port, wherein said amount of time is controlled by said control unit, wherein processing of an I/O request at said first port is delayed by said amount of time if said level of I/O activity at said second port exceeds a predetermined threshold, wherein processing of an I/O request at said first port is not delayed if said level of I/O activity at said second port does not exceed said predetermined threshold.