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AssigneeInternational Business Machines Corporation
InventorsAllen Keith Bates, Nils Haustein, Craig Anthony Klein, Daniel James Winarski
Estimating the term…
Data for storage by holographic data storage is arranged in an intermediate data storage as data segments which are replicas of holographic storage segments. Files of data are aggregated into the data segments, and a destaging control determines the destaging of the data segments to the holographic data storage in accordance with a plurality of policies, such as whether a segment is full, a time threshold has been reached, or whether a threshold number of segments are “open”. The intermediate data storage may be arranged into a number of partitions at least equal to the number of sources having input to the data destaging system, the partitions comprising integral multiples of the data segments.
A method for providing data for holographic data storage comprising the steps of:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Digital recording or reproducing: formatting, e.g. arrangement of data block or words on the record carriers
Recording, reproducing or erasing methods; Read, write or erase circuits therefor: recording, reproducing or erasing by using optical interference…
Wherein the formatting concerns a specific area of the disc: cluster, i.e. a data structure which consists of a fixed number of sectors or ECC blocks
Wherein the formatting concerns a specific kind of data: formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data…
About 1 year 11 months of term left · ends 12 Sep 2028 (estimated)
Commonly assigned US Application Serial No. (TUC920070009US1) filed on even data herewith relates to data destaging systems and computer program products configured to arrange and destage data to holographic storage.
This invention relates to holographic data storage, and, more particularly, to arranging data for storage by holographic data storage.
Holographic storage comprises a high density data storage capability. Data is recorded into a holographic medium by employing a data beam that is two-dimensional in nature and comprises a rectangular image of a large number of bits arranged in a raster pattern. The data beam and a reference beam are separately directed to the holographic medium and intersect and interfere to form an interference wave font that is recorded as a holographic image known as a hologram into the holographic medium. Additional holograms may be recorded long linear tracks and at various depths of the holographic medium to provide a high capacity data storage.
FIG. 1 is a block diagram illustrating an embodiment of a data destaging system for destaging data from a host to holographic media;
FIG. 2 is a flow chart depicting an embodiment of data destaging;
FIG. 3 is a flow chart depicting an embodiment of re-opening destaged data; and
This invention is described in preferred embodiments in the following description with reference to the Figures, in which like numbers represent the same or similar elements. While this invention is described in terms of the best mode for achieving this invention's objectives, it will be appreciated by those skilled in the art that variations may be accomplished in view of these teachings without deviating from the spirit or scope of the invention.
Referring to FIG. 1, an embodiment of a data destaging system 10 is illustrated that provides efficiency in storing data, for example, from host disk storage 101 of a host system 100, as holographic images 123 in a holographic media 121 of a holographic data storage 120.
Data for storage by the holographic data storage 120 is arranged in an intermediate data storage 111 as data segments 113 which are replicas of holographic storage segments, meaning that the data segments 113 are essentially an area of volatile memory, non volatile memory, or disk, of the same capacity or storage size as a hologram 123 stored on holographic media 121, or the same capacity or storage size as an integral number of hologram segments stored on the holographic media.