Method of and apparatus for taking back-up and checking alteration of data, and computer product
AssigneesFujitsu Limited, Fujitsu Frontech Limited
InventorTakayuki Matsui
Life of this patent
Estimating the term…
Abstract
The invention relates to taking a back-up of original data and deciding whether the original data has been altered. A back-up of the original data is taken by copying the original data from one storing unit to other storing unit as back-up data. Once the copying is over, it is decided whether the original data has been altered based on a comparison between the original data and the back-up data. All the requests for access to the original data received while the original data is being copied are denied but request received while alteration of the original data is being decided are allowed.
Claims9
An alteration checking apparatus comprising:
- a back-up unit that copies original data from an original data storage unit to a back-up data storage unit as back-up data;
- and
- an alteration deciding unit that, after copying of the original data as the back-up data is over, decides whether the original data has been altered based on a comparison between the original data and the back-up data.
A method of taking a back-up of original data and deciding whether the original data has been altered, comprising:
- copying the original data as back-up data;
- and
- deciding, after the copying is over, whether the original data has been altered based on a comparison between the original data and the back-up data.
A computer program containing instructions which when executed on a computer causes the computer to execute:
- copying the original data as back-up data;
- and
- deciding, after the copying is over, whether the original data has been altered based on a comparison between the original data and the back-up data.
Dependencies are inferred from the claim text.