| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for controlling access to logical volumes disposed in an information storage and retrieval system in using parallel access volumes. SOLUTION: N pieces of host computer groups and N pieces of logical volume groups are formed. The method creates a parallel access volume having an alias, and persistently associates the parallel access volume with an original base logical volume, where the original base logical volume may be assigned to one of N pieces of logical volume groups or released from assignment. If the base logical volume is assigned to the (i)-th logical volume group, the method permits each host computer assigned to the (i)-th host computer group to access the original base logical volume, or the current base logical volume, associated with the parallel access volume. COPYRIGHT: (C)2005,JPO&NCIPI
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