US 7,523,287 B2
Storage system and method for restricting access to virtual memory area by management host, and program for executing the same
Toru Tanaka, Kawasaki (Japan); Masayuki Yamamoto, Sagamihara (Japan); Yuichi Taguchi, Sagamihara (Japan); and Yasunori Kaneda, Sagamihara (Japan)
Assigned to Hitachi, Ltd., Tokyo (Japan)
Filed on Jun. 06, 2006, as Appl. No. 11/447,075.
Claims priority of application No. 2006-090451 (JP), filed on Mar. 29, 2006.
Prior Publication US 2007/0233983 A1, Oct. 04, 2007
Int. Cl. G06F 12/00 (2006.01); G06F 13/00 (2006.01); G06F 13/28 (2006.01); G06F 15/173 (2006.01)
U.S. Cl. 711—170  [709/226] 21 Claims
OG exemplary drawing
 
1. A storage system having first and second storage devices; a management host for managing the first and second storage devices; a requesting host for making a request directed to a memory area for use of the first storage device; and an Internet storage name service (iSNS) server for managing a discovery domain (DD), and a network connecting among the storage devices, the server and the hosts, wherein:
the management host comprises a processing portion and a memory portion;
the memory portion of the management host stores group management information including a name of the memory area for use of the first storage device and a name of an external memory area physically configured in the second storage device, said memory area for use being a virtual memory area presented to the requesting host as configured in the first storage device while mapped to the external memory area;
the management host notifies the second storage device of the name of the external memory area, based on the name of the memory area for use;
the second storage device configures a memory area in the second storage device as the external memory area with the name of the external memory area notified from the management host;
the iSNS server registers a lower DD between the first and second storage devices;
the first storage device registers a mapping-setting of the name of the memory area for use and the name of the external memory area;
the iSNS server registers an upper DD between the requesting host and the first storage device; and
the requesting host mounts on the memory area for use of the first storage device, and manages the external memory area after the external storage area is configured.