Storage virtualizer and computer system using the same

Details Storage virtualizer and computer system using the same Storage virtualizer and computer system using the same

2006-03-24

2008-12-16

Nguyen, Than (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S112000, C714S005110, C714S025000

Reexamination Certificate

active

07467258

ABSTRACT:
The storage virtualizer does not repeatedly switch a path used by a host computer when failure occurs in a path between a physical storage unit and a virtual storage unit. The storage virtualizer comprises: a plurality of targets connectable to the host computer; a unit for connecting at least one physical storage unit to the targets via a plurality of paths; a virtualization unit producing at least one virtual storage unit by at least a part of a storage area of the physical storage unit and allowing the host computer to access to the virtual storage unit, the virtualization unit real-accessing to the physical storage unit via the path corresponding to the target accessed when the access is executed; means for detecting failure of real access to the physical storage via each of the paths; and a target control unit blocking the target corresponding to the failure path, which is detected by the detecting means, with respect to the host computer.

REFERENCES:
patent: 7181578 (2007-02-01), Guha et al.
patent: 7318138 (2008-01-01), Usgaonkar et al.
patent: 2006/0112251 (2006-05-01), Karr et al.
patent: 4-98439 (1992-03-01), None
patent: 2000-148655 (2000-05-01), None
patent: 2001-27972 (2001-01-01), None
patent: 2001-154929 (2001-06-01), None

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