File recovery system

Details File recovery system File recovery system

1994-11-29

1998-03-31

Black, Thomas G.

39518204, 39518206, 39518218, G06F 1730

Patent

active

057348952

ABSTRACT:
A saving tape is previously produced once on producing a file, and a block image after updating the file by a process group continues to be accumulated in a journal tape group. At an optional timing, a tape roll-forward process repeats to perform a roll forward for the saving tape and to produce a new saving tape in accordance with a journal accumulated into the journal group. On occurrence of fault in the file, a recovery is performed using the new saving tape and the journal tape group newly accumulated on and after the time of the final roll forward process.

REFERENCES:
patent: 5086502 (1992-02-01), Malcolm
patent: 5276860 (1994-01-01), Fortier et al.
patent: 5412801 (1995-05-01), De Remer et al.
patent: 5446884 (1995-08-01), Schwendemann et al.
patent: 5455946 (1995-10-01), Mohan et al.
"ACOS-6/MVX II Data Management File Management Supervisor User's Guide", FFB5IE-3, NEC Corporation, (1991), pp. 1-25.

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