System and method for reading and writing disks formatted...

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

G - Physics

11

B

352/10.4

G11B 20/12 (2006.01) G06F 3/06 (2006.01) G06F 17/30 (2006.01) G11B 27/02 (2006.01)

Patent

CA 2014799

- 68 - 730.1003 ABSTRACT OF THE DISCLOSURE 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 source and destination disks, retrieve the source files in the source file format, store the source files in a common format in memory that allows the directory hierarchy of the source disk and destination disk to be maintained, translates the records of the source files to the format of the destination file system if desired, creates directories for the destination disk for combined specified contents of the source and destination disk, creates index information for the files being added to 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 using the host computer system and then transfer the modified files back to the foreign disk in the foreign file format using the same transfer processes with the host system format disk acting as the source and the foreign system format disk acting at the destination. 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 - 69 - 730.1003 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.

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