Patent ID: 7519786
Filing Date: 2009-04-14
Classification: G06F

Abstract:
1. A storage system, comprising: a plurality of mapping source storage systems including therein respectively a plurality of logical devices mapped respectively to a plurality of virtual devices provided in a mapping destination storage system, said mapping source storage systems being directly and respectively connected to a plurality of host systems; and a management terminal which restricts access by the host systems to the logical devices by transmitting a reserve command from the mapping destination storage system to the mapping source storage systems, wherein, upon receiving a first reserve command containing a first password from said mapping destination storage system, one of said mapping source storage systems reserves an exclusive right to access said virtual device therein to said mapping destination storage system and restricts access from an initiator other than said mapping destination storage system to said logical device as designated in said first reserve command, and wherein, upon receiving a second reserve command containing said first password from an initiator other than said mapping destination storage system after receiving said first reserve command, said one mapping source storage system transfers the exclusive right to access from said mapping destination storage system to said initiator which issues said second reserve command.