Electrical computers and digital processing systems: memory – Address formation – Address mapping
Reexamination Certificate
2006-06-21
2009-02-17
Kim, Matt (Department: 2186)
Electrical computers and digital processing systems: memory
Address formation
Address mapping
C711S112000, C711S114000, C711S117000, C711S118000
Reexamination Certificate
active
07493466
ABSTRACT:
A first storage controller has a multilayer memory hierarchy constructed by LDEV (logical device) connected from LUN, and VDEV (virtual device) connected to the lower order of the LDEV. At least one of the VDEVs is constructed by mapping the memory resources arranged in external storage controllers. The functions of a stripe, RAID, etc. can be added in the mapping. Various kinds of functions (remote copy, variable volume function, etc.) applicable to the normal internal volume can be also used in a virtual internal volume by using the external memory resource as the virtual internal memory resource so that the degree of freedom of utilization is raised.
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White Paper, “Network Attached Storage in the Data Protection En
Nakayama Shin-ichi
Tamura Keishi
Uchiumi Katsuhiro
Hitachi , Ltd.
Kim Matt
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Patel Hetul
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