System for updating directory information and data on write once

Details System for updating directory information and data on write once System for updating directory information and data on write once

1993-04-19

1995-07-25

Powell, Mark R.

G06F 1200

Patent

active

054370124

ABSTRACT:
A method and apparatus for updating data stored in a write once/read many memory which comprises creating a virtual image of data stored in the memory, updating data in the virtual image of the memory and designating updated data in the virtual image, and writing designated updated data from the virtual image to the memory. In the virtual image there is a main journal for organizing file information on the memory and file journals for each file stored on the memory. Each file journal contains self-describing information for its corresponding file.

REFERENCES:
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patent: 4979159 (1990-12-01), Tsuruoka et al.
patent: 5034914 (1991-07-01), Osterlund
patent: 5073887 (1991-12-01), Takagi et al.
patent: 5113061 (1992-05-01), Tanaka
patent: 5218685 (1993-06-01), Jones
patent: 5288982 (1994-02-01), Hosoya

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