Patent ID: 6237028
Filing Date: 2001-05-22
Classification: G06F

Abstract:
An arrangement for allocating a disk drive memory unit to a selected controller in a plurality of data processing systems, each said data processing system having a host central processor and an associated controller including memory, all said data processing systems to be cooperatively associated with a number of disk drive memory units, each said disk drive memory unit coupled to all said controllers, whereby any one of said host central processors can appropriate any one of said disk drive memory units as a ""selected"" disk drive memory unit by propagating prescribed ""path-control-data"" to the memory in all said controllers and in the selected disk drive memory unit the arrangement further comprising;propagate means for propagating command signals and said ""path control data"" from one of said host central processors to the associated controller and its memory as the ""selected"" controller to allocate one of said disk drive memory units as the ""selected"" disk drive memory unit;interrupt means for interrupting all other controllers by sending a command from said selected controller;transmit means for sending a command by said other controller, via said selected disk drive memory unit so said selected controller indicating that the information is received; andsignal means for indicating successful allocation by said selected controller to said one of said host central processors.