System and method for reading and writing disks formatted for an

Details System and method for reading and writing disks formatted for an System and method for reading and writing disks formatted for an

1995-01-23

1996-07-16

Heckler, Thomas M.

Boots, shoes, and leggings

364DIG1, 3642609, 3642802, G06F 1300

Patent

active

055375928

ABSTRACT:
The present invention provides an independent set of processes and data structures that allow data transfer between differently formatted disks of files specified by the user. The processes identify the file format of the disks, retrieve the files in the source file format, store the source files in a common format in memory that allows the directory hierarchy of the disks to be maintained, translates the files to the format of the destination file system disk, creates index information for the destination disk, and stores the files, directories and indexes on the destination disk in the destination file format. The user can then access and modify the files and transfer the modified files back to the foreign disk in the foreign file format using the same transfer processes. The common memory format is a data structure which is a two dimensional list with one dimension maintaining the directory hierarchy of the source disk and the second dimension maintaining the hierarchy of the destination disk. Data and directory rings are used to store file contents as they are transferred from one disk to the other and pagable windows storing the contents of index files on the source and destination disks are used to enhance transfer speed.

REFERENCES:
patent: 4477880 (1984-10-01), Advani et al.
patent: 4559614 (1985-12-01), Peek et al.
patent: 4858114 (1989-08-01), Heath et al.
patent: 5053945 (1991-10-01), Whisler
IBM Technical Disclosure Bulletin; "DOS Interface to Non-DOS Formatted Driver", vol. 28, No. 8, Jan. 1986.
IBM Technical Disclosure Bulletin, vol. 28, No. 8, Jan. 1986, Research Disclosure, 2244, (1984) Aug. No. 244.
European Search Report completed Jan. 23, 1992 by Examiner Weiss P. at The Hague.

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