Storage system, and data management and migration method

Details Storage system, and data management and migration method Storage system, and data management and migration method

2006-10-16

2009-06-09

Verbrugge, Kevin (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S203000, C711S112000

Reexamination Certificate

active

07546433

ABSTRACT:
A storage system or data management and migration method enabling migration of an access destination for a host system without having to stop the transmission of data between the host system and storage apparatuses. The storage system includes: a host system that issues a data read/write request; an external storage apparatus that provides an external logical volume for storing the data; and a first storage apparatus that creates a first virtual logical volume. In this system, the host system makes a request to the first storage apparatus to map volume information composed of the management information for the external logical volume; in response to the mapping request, the first storage apparatus maps the volume information for the external logical volume onto the first virtual logical volume and sends the volume information for the external logical volume and first virtual logical volume to the host system; based on the volume information for the external logical volume sent from the first storage apparatus, the host system searches for any virtual logical volume having the same volume information as the volume information for the first virtual logical volume or external logical volume, and sets the virtual logical volume searched for in this search as an alternate volume for receiving requests to read/write data from/to the external logical volume.

REFERENCES:
patent: 7124143 (2006-10-01), Matsunami et al.
patent: 2006/0129537 (2006-06-01), Torii et al.
patent: 2005-353035 (2005-02-01), None
patent: 2006-164211 (2005-03-01), None

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