Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2007-07-17
2007-07-17
Portka, Gary (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S114000, C711S173000
Reexamination Certificate
active
11011815
ABSTRACT:
In a memory apparatus, there are provided a mirror primary LU which is a memory region on a plurality of storage media formed of nD+1P, a mirror secondary LU that is a memory region on a plurality of storage media formed of mD+1P, an n-RAID control subprogram for performing RAID control of nD+1P, an m-RAID control subprogram for performing RAID control of mD+1P, and an LU mirror subprogram for performing writing into the mirror primary LU and mirror secondary LU and then effectuating duplexing or “mirroring” when a computer issues a data write request. The “m” and “n” are different integers more than or equal to 2.
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Mannen Akihiro
Matsunami Naoto
Mimatsu Yasuyuki
Muraoka Kenji
Yagisawa Ikuya
Hitachi , Ltd.
Patel Kaushik
Portka Gary
Townsend and Townsend / and Crew LLP
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