The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2011
Filed:
Dec. 12, 2007
Arieh Don, Newton, MA (US);
Ofer E. Michael, Irvine, CA (US);
Patrick Brian Riordan, Watertown, MA (US);
Ian Wigmore, Westborough, MA (US);
Anestis Panidis, Weston, MA (US);
Arieh Don, Newton, MA (US);
Ofer E. Michael, Irvine, CA (US);
Patrick Brian Riordan, Watertown, MA (US);
Ian Wigmore, Westborough, MA (US);
Anestis Panidis, Weston, MA (US);
EMC Corporation, Hopkinton, MA (US);
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.