Patent ID: 6505257
Filing Date: 2003-01-07
Classification: G06F

Abstract:
A method of performing maintenance on a disk controller which is coupled between a host computer and a disk drive and has a plurality of channel control processors and a plurality of drive control processors, said method comprising the steps of:(a) selecting one of a plurality of clusters, each of which includes at least one of said plurality of channel control processors and at least one said plurality of drive control processors; and (b) loading a new version of a program into a memory of each of said channel control processors and one each of said drive control processors contained in said selected one of said plurality of clusters from an external device of said disk controller while a non-selected one of said plurality of clusters, not having loaded said new version of said program in memory of each of said channel and drive control processors contained in said non-selected one of said plurality of clusters, continues processing an instruction from said host computer.