Multiple file system having a plurality of file units holding the same files in which loss of data is prevented in a failure of a file unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 21, 1993
Issued Date -
N/A
app pub date -
Jul 10, 1992
filing date -
Feb 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multiple file system having multiple identical file units each holding the same data files identified by a chronological revision number. Each file unit, in addition to magnetic data storage, contains input receiver and output driver stages which can be inhibited by a prohibition signal generated by a latch relay circuit in a corresponding file unit to keep the other file unit inactive when a failure occurs in the other file unit. Upon return of the other file to normalcy, the corresponding file is reset to discontinue the prohibition signal and the revision numbers of corresponding files in each file unit are compared to replace the file contents having the older revision number with the file contents having the newer revision number.
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