Patent ID: 7484066
Filing Date: 2009-01-27
Classification: G06F

Abstract:
1. In a system having an internal storage system and an external storage system, a method for allowing the external storage system to inherit parameters from the internal storage system, the method comprising: establishing in the internal storage system a first management table, wherein the first management table includes performance management information relating to storage system operations, the performance management information including a performance parameter for a virtual logical storage unit in the internal storage system and a logical storage unit identifier identifying the virtual logical storage unit, wherein the virtual logical storage unit corresponds to a logical storage unit that is physically present in the external storage system, and wherein information in the first management table is used to operate a controller of the internal storage system; establishing in the external storage system a second management table for the logical storage unit that is physically present in the external storage system, information in the second management table being used to operate a controller of the external storage system; transferring the performance management information from the first management table to the second management table, including modifying the logical storage unit identifier in the transferred performance management information to identify the logical storage unit physically present in the external storage system that corresponds to the virtual logical storage unit; and operating the logical storage unit in accordance with the-transferred performance management information.