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:
Dec. 15, 2009
Filed:
Sep. 15, 2006
Kevin W. Kark, Poughkeepsie, NY (US);
Liyong Wang, Wappingers Falls, NY (US);
Carl B. Ford, Iii, Poughkeepsie, NY (US);
Pak-kin Mak, Poughkeepsie, NY (US);
Kevin W. Kark, Poughkeepsie, NY (US);
Liyong Wang, Wappingers Falls, NY (US);
Carl B. Ford, III, Poughkeepsie, NY (US);
Pak-kin Mak, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Storage protection keys and system data share the same physical storage. The key region is dynamically relocatable by firmware. A Configuration Array is used to map the absolute address of the key region in to its physical address. The absolute address of keys can be fixed even though the physical location of the keys is relocated into a different region. A triple-detect double correct ECC scheme is used to protect keys. The ECC scheme is different from regular data in the storage and can be used to detect illegal access. Extra firmware and hardware is also designed to restrain customer's applications from directly accessing keys. With the key region being relocatable, the firmware could move the key region away from a known faulty area in a memory to improve system RAS. We also achieved the commonality objective that key memory device can use the same memory devices with other server systems that do not use keys.