Non-disruptive migration using device identity spoofing and...

Details Non-disruptive migration using device identity spoofing and... Non-disruptive migration using device identity spoofing and...

2007-12-12

2011-11-15

Patel, Hetul (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S162000

Reexamination Certificate

active

08060710

ABSTRACT:
On-line storage devices are migrated to new storage devices in a non-disruptive manner. A host executing multipath I/O software is initially coupled to a source storage device via at least one active path. The target storage device is configured with the source device's device identification information. The target storage device is coupled to the host via a passive path so that the target storage device can return its device identification information to the host but cannot respond to I/O read or I/O write requests from the host. All paths between the host and the source storage device are then disconnected. An on-line data migration session between the source storage device and the target storage device is then activated. The path between the target storage device and the host is then re-configured from passive to active so that the target storage device can respond to I/O read and I/O write requests.

REFERENCES:
patent: 5623669 (1997-04-01), Kincaid
patent: 5835954 (1998-11-01), Duyanovich et al.
patent: 6108748 (2000-08-01), Ofek et al.
patent: 6405294 (2002-06-01), Hayter
patent: 7058731 (2006-06-01), Kodama
patent: 2007/0136524 (2007-06-01), Murayama

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