Patent ID: 6526489
Filing Date: 2003-02-25
Classification: G06F

Abstract:
A disk apparatus comprising, a host device interface for sending and receiving data to and from a plurality of host devices, data storage means for storing data to be sent to said host devices, and control means for controlling the writing of data to, and the reading of data from, said data storage means, characterized in that said control device comprises: an address registration unit, in which the host address of each host device has been registered in advance, for the purpose of authorizing access, a command interpretation and execution unit, which on receipt of a command from a host device via said host device interface outputs the host address of said host device based on said command, and an address verification unit for verifying the host address, output from said command interpretation and execution unit against said host address of each host device registered in advance in said address registration unit, and for determining whether or not the particular host device has access authorization;wherein said command interpretation and execution unit incorporates an authorization pending function so that on receipt of a command from a host device the command is interpreted and executed only after access is authorized by said address verification unit; and wherein a host information storage unit which stores information, such as host names and passwords about the host devices, is incorporated into said address registration unit, wherein a host device check unit, which on receipt of host information from a host device, determines whether or not that particular host device has access authorization based on the host information received from the host device and the host information stored in said host information storage unit, is incorporated into said command interpretation and execution unit, and wherein said host check unit incorporates an address registration function which registers the access authorization based on the host information and the host address determined for the host device which are in said address registration unit.