Computer system having an expansion device for virtualizing...

Details Computer system having an expansion device for virtualizing... Computer system having an expansion device for virtualizing...

2008-10-30

2010-12-28

Kim, Hong (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S002000, C711S005000, C711S006000, C711S112000, C711S142000

Reexamination Certificate

active

07861052

ABSTRACT:
A migration destination storage creates an expansion device for virtualizing a migration source logical unit. A host computer accesses an external volume by way of an access path of a migration destination logical unit, a migration destination storage, a migration source storage, and an external volume. After destaging all dirty data accumulated in the disk cache of the migration source storage to the external volume, an expansion device for virtualizing the external volume is mapped to the migration destination logical unit.

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