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:
Feb. 01, 2011
Filed:
Oct. 15, 2007
Gerald Keith Bartley, Rochester, MN (US);
Darryl John Becker, Rochester, MN (US);
John Michael Borkenhagen, Rochester, MN (US);
Paul Eric Dahlen, Rochester, MN (US);
Philip Raymond Germann, Oronoco, MN (US);
William Paul Hovis, Rochester, MN (US);
Gerald Keith Bartley, Rochester, MN (US);
Darryl John Becker, Rochester, MN (US);
John Michael Borkenhagen, Rochester, MN (US);
Paul Eric Dahlen, Rochester, MN (US);
Philip Raymond Germann, Oronoco, MN (US);
William Paul Hovis, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus implement redundant memory access using multiple controllers on the same bank of memory, and a design structure on which the subject circuit resides is provided. A first memory controller uses the memory as its primary address space, for storage and fetches. A second redundant controller is also connected to the same memory. System control logic is used to notify the redundant controller of the need to take over the memory interface. The redundant controller initializes if required and takes control of the memory. The memory only needs to be initialized if the system has to be brought down and restarted in the redundant mode. This invention allows the system to continue to stay up and continue running during a memory controller or link failure.