Storage apparatus and data management method using the same

Details Storage apparatus and data management method using the same Storage apparatus and data management method using the same

2007-02-02

2009-12-01

Bragdon, Reginald G (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Memory configuring

C711S114000, C711S162000

Reexamination Certificate

active

07627731

ABSTRACT:
The expansion of a mapping table with additional mapping information involved in the access to virtual volumes is prevented and so a search in the mapping information within a valid time period is ensured, thereby preventing degradation of system performance. A storage apparatus, which defines virtual volumes to which storage areas are dynamically allocated, has a data migration function to migrate data between the virtual volumes and real volumes. With the data migration function, the mapping information for the migrated data is deleted from the mapping table, and accordingly, the size of the mapping table can be limited.

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