Apparatus and method for copying and restoring disk files

Details Apparatus and method for copying and restoring disk files Apparatus and method for copying and restoring disk files

1993-07-22

1996-07-09

Swann, Tod R.

39518204, 395488, 395489, G06F 1122, G06F 1500

Patent

active

055353819

ABSTRACT:
A method and apparatus for backing up files from a logical disk are described to a backup tape and restoring all or part of the files to the logical disk. Separate "backup" and "copy" buffers in the host processor's main memory are employed during a backup operation. Backup buffers hold data read from the logical disk during the sequential backup operation. Copy buffers hold data read from the logical disk prior to execution of a write operation to a portion of the disk not yet backed up. Data is stored on the backup tape in logical tape records containing either backup data or copied data. A full restoration of all files can be done in one read of the backup tape. A partial restoration of selected files can be done in two reads of the backup tape.

REFERENCES:
patent: 5086502 (1992-02-01), Malcolm
patent: 5109505 (1992-04-01), Kihara
patent: 5210829 (1993-05-01), Bitner
patent: 5226157 (1993-07-01), Nakano et al.
patent: 5404508 (1995-04-01), Konrad et al.

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