Virtualization system and area allocation control method

Details Virtualization system and area allocation control method Virtualization system and area allocation control method

2010-09-07

2011-10-04

Ellis, Kevin (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Memory configuring

C711S162000, C711S172000, C711SE12001

Reexamination Certificate

active

08032731

ABSTRACT:
A virtualization system, upon judging that a write operation from a higher-level device is an operation to write in the format of the virtual volume, even when the write position of the write operation is in a virtual area different from a virtual area to which an allocated actual area has been allocated, if there is an unused area in the allocated actual area, writes management information to the unused area according to the write operation, and if there is no unused area in the allocated actual area, newly allocates an unallocated actual area, and writes management information to the newly allocated actual area according to the write operation.

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European Search Report of Patent Application No. 07251384.9 mailed Apr. 23, 2010.
Machine Translation JP 2006-263940.

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