Stratus Technologies Bermuda Ltd.

Thomas Olson

A method and apparatus for storing transactional information in persistent memory. In one embodiment, the invention features a persistent volatile memory and an intermediary program in communication with the persistent volatile memory. The intermediary program receives transactional information and stores the information in the persistent volatile memory. A computer uses the intermediary program to enable the contents of the persistent volatile memory to remain unaltered during a failure of the computer. Additionally, the intermediary program may determine whether the transactional information meets a predetermined criteria before storing the information in the persistent volatile memory.

Method and apparatus for storing transactional information in persistent memory

A method and apparatus for persistent volatile computer memory. In one embodiment, the memory of a computer in partitioned into two regions, one directly accessible to the operating system and one accessible to the operating system only through an intermediary program such as a device driver. In another embodiment, the partitioning of computer memory is achieved through modifications to the computer's BIOS, preventing the operating system from directly addressing a region of volatile computer memory and protecting the contents of the region from modification during a boot cycle.

Methods and apparatus for persistent volatile computer memory

Methods and apparatus for providing improved maintenance of consistent, redundant mass storage images. In one embodiment, one feature of the invention is the presence of non-volatile storage and persistent volatile memory, where the persistent volatile memory is used to store write transactions posted to non-volatile storage. Another feature of the invention is an intermediary program, such as a device driver, that serves as an intermediary between the operating system and non-volatile storage that processes write requests from the operating system directed to non-volatile storage, stores their contents in persistent volatile memory, and then completes the write to non-volatile storage. Yet another feature of the invention is that the contents of the persistent memory region are resistant to initialization or modification during a boot cycle. Another feature of the invention is that the intermediary program processes write requests atomically, preventing the results of incomplete or partial transactions from subsequent loading from the persistent memory region by computer applications.

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Westborough, MA, United States of America

Thomas Olson