This inventor holds 5 USPTO granted patents. Top assignee: International Business Machines Corporation. Active years: 1978-1985.
Location History:
- Tucson, AZ (US) (1978 - 1983)
- Pima County, AZ (US) (1984 - 1985)
Company Filing History:
Years Active: 1978-1985
Title: Innovations of John H Christian
Introduction
John H Christian is a notable inventor based in Tucson, AZ. He has made significant contributions to the field of data storage systems, holding a total of 5 patents. His work primarily focuses on methods and systems that enhance the efficiency of data handling in hierarchical storage environments.
Latest Patents
One of his latest patents is titled "Method and system for handling sequential data in a hierarchical store." This invention describes a process where data is promoted from a backing store, specifically disk storage apparatus termed DASD, to a random access cache in a peripheral data storage system. When a sequential access bit is sent to the storage system, all data specified in a read command is fetched to the cache from DASD. If such prefetched data is replaced from cache and the sequential bit is on, a subsequent host access request for such data causes all related data, up to a predetermined maximum, not yet read to be promoted to cache.
Another significant patent is the "Method and apparatus for a hierarchical paging storage system." This invention involves a plurality of addressable data storage devices that can be selectively accessed directly or via a cache memory. Access through the cache memory utilizes one of several logical addresses, with each data storage device represented by multiple logical addresses. The system allows for the reservation of data storage devices for direct access, while access via the cache does not apply to such reservations. Accesses to the devices are queued on a device basis.
Career Highlights
John H Christian is currently employed at International Business Machines Corporation, commonly known as IBM. His work at IBM has allowed him to develop innovative solutions that address complex data storage challenges.
Collaborations
Throughout his career, John has collaborated with notable colleagues, including Arthur H Nolta and David G Reed. These collaborations have contributed to the advancement of technology in data storage systems.
Conclusion
John H Christian's contributions to the field of data storage through his innovative patents demonstrate his expertise and commitment to advancing technology. His work continues to influence the efficiency of data handling in modern systems.