Apparatus and method for copying and restoring disk files
US5535381A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 1993 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Jul 22, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0656
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.