05201044 is referenced by 234 patents and cites 8 patents.

A data processing system includes both volatile and nonvolatile memories, user-inaccessible file control software and performs a method for recovering from a malfunction occurring during a file transaction that prevents accomplished microscopic transactions from being lost. The method comprises the steps of: providing a log file to maintain a record of file transactions which may span both the volatile and nonvolatile memories; recording in the portion of the log file in volatile memory, old and new data images which result during a file transaction; writing the old and new data images to a portion of the log file which is contained in nonvolatile memory, with the new data image being written after it is certain that the old data image is present in the nonvolatile memory; and in the event of a malfunction, employing the log file in nonvolatile memory to determine the status of a file transaction and rolling back the transaction in the event the malfunction occurred prior to its completion, and further assuring that all file system actions have actually occurred for transactions marked as completed.

Title
Data processing method for file status recovery includes providing a log file of atomic transactions that may span both volatile and non volatile memory
Application Number
7/509853
Publication Number
5201044
Application Date
April 16, 1990
Publication Date
April 6, 1993
Inventor
James Perchik
Cambridge
MA, US
Noah R Mendelsohn
Arlington
MA, US
Joel M Gould
Norwood
MA, US
Richard C Mosteller
Sierra Madre
CA, US
Alexander H Frey Jr
Pasadena
CA, US
Agent
Perman & Green
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 15/00
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