Detecting tampering of data during media migration, and storage device
AssigneeInternational Business Machines Corporation
InventorsTakashi Katagiri, Yuhko Mori, Hirokazu Nakayama, Yutaka Oishi
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Abstract
A method for detecting at a migration destination medium a change in data during media migration between write once read many (WORM) media according to one embodiment includes writing data for WORM from a migration source medium to the migration destination medium; holding an identifier (ID) of the source medium in a non-user storage area in the destination medium; and holding information indicating a feature of the data in the non-user storage area.
Claims20
A storage device for generating and recording metadata in a migration destination medium, the metadata being for enabling detection of a change in data during media migration between write once read many (WORM) media, the device comprising:
- a controller comprising:
- logic adapted to write data for WORM from a migration source medium to a migration destination medium;
- logic adapted to hold an identifier (ID) of the source medium in a non-user storage area in the destination medium;
- and
- logic adapted to hold feature information in the non-user storage area, wherein the feature information indicates one or more features of the data.
A method for detecting at a migration destination medium a change in data during media migration between write once read many (WORM) media, the method comprising:
- writing data for WORM from a migration source medium to the migration destination medium;
- holding an identifier (ID) of the source medium in a non-user storage area in the destination medium;
- and
- holding information indicating a feature of the data in the non-user storage area.
A computer program product for detecting at a migration destination medium a change in data during media migration between write once read many (WORM) media, the computer program product comprising to computer readable storage medium having program code embodied therewith, the program code readable/executable by a device to:
- write, by the device, data for WORM from a migration source medium to the migration destination medium;
- hold, by the device, an identifier (ID) of the source medium in a non-user storage area in the destination medium;
- and
- bold, by the device, feature information in the non-user storage area, wherein the feature information indicates one or more features of the data.
Dependencies are inferred from the claim text.