초록 ▼

A storage system includes a first de-duplication scope comprising a first volume, a first table of hash values corresponding to first chunks of data stored on the first volume, and a first table of logical block addresses of where the chunks of data are stored on the first volume. A second de-duplic

A storage system includes a first de-duplication scope comprising a first volume, a first table of hash values corresponding to first chunks of data stored on the first volume, and a first table of logical block addresses of where the chunks of data are stored on the first volume. A second de-duplication scope includes similar information for a second volume. The first scope is used for de-duplicating and storing first data from a first data source and the second scope is used for de-duplicating and storing second data from a second data source. First storage mediums that make up the first volume remain powered off while de-duplication and storage of the second data on the second volume takes place, and second storage mediums that make up the second volume remain powered off while de-duplication and storage of the first data takes place, thereby enabling data de-duplication while saving power.

대표청구항 ▼

1. A method of operating a storage system having a controller in communication with one or more storage mediums, the method comprising the steps of: acquiring one or more disc array group IDs to which a data is allocated;acquiring one or more medium IDs corresponding to the acquired one or more disc

1. A method of operating a storage system having a controller in communication with one or more storage mediums, the method comprising the steps of: acquiring one or more disc array group IDs to which a data is allocated;acquiring one or more medium IDs corresponding to the acquired one or more disc array group IDs;powering on one or more storage mediums corresponding to the acquired one or more medium IDs;transferring the data to the one or more storage mediums which were powered on;comparing content of the data with content of any existing data stored in the one or more storage mediums which were powered on; andkeeping the content of the data in the one or more storage mediums which were powered on when the content of the data does not correspond to the existing data stored in the one or more storage mediums. 2. The method according to the claim 1, further including: storing an information linking an identifier of the data with an identifier of the existing data stored in the one or more storage mediums that were powered on when the content of the data corresponds to the existing data stored in the one or more storage mediums. 3. The method according to the claim 2, further including: powering off the one or more storage mediums which were powered on following completion of the storing the information linking an identifier of the data with an identifier of the existing data stored in the one or more storage mediums. 4. The method according to the claim 1, wherein storage mediums other than the storage mediums which were powered on are in power off status. 5. The method according to the claim 1, further including: powering off the one or more storage mediums which were powered on following completion of the storing the content of the data. 6. The method according to the claim 1, wherein hash values of the existing data stored in the one or more storage mediums are managed in the storage system, the method further including:calculating a hash value for the content of the data in order to compare the content of the data with the content of any existing data stored in the one or more storage mediums. 7. A storage system having a controller in communication with one or more storage mediums, the storage system comprising: an acquiring module to acquire one or more disc array group IDs to which a data is allocated, wherein the acquiring module acquires one or more medium IDs corresponding to the acquired one or more disc array group IDs;a power control module to power on one or more storage mediums corresponding to the acquired one or more medium IDs;a data transfer module to transfer the data to the one or more storage mediums which were powered on; anda comparison module to compare content of the data with content of any existing data stored in the one or more storage mediums;wherein the controller keeps the content of the data in the one or more storage mediums which were powered on when the content of the data does not correspond to the existing data stored in the one or more storage mediums. 8. The storage system according to the claim 7, wherein the controller stores an information linking an identifier of the data with an identifier of the existing data stored in the one or more storage mediums that were powered on when the content of the data corresponds to the existing data stored in the one or more storage mediums. 9. The storage system according to the claim 8, wherein the power control module powers off the one or more storage mediums which were powered on following completion of the storing the information linking an identifier of the data with an identifier of the existing data stored in the one or more storage mediums. 10. The storage system according to the claim 7, wherein storage mediums other than the storage mediums which were powered on are in power off status. 11. The storage system according to the claim 7, wherein the power control module powers off the one or more storage mediums which were powered on following completion of the storing the content of the data. 12. The storage system according to the claim 7, wherein hash values of the existing data stored in the one or more storage mediums are managed in the storage system, the storage system further including:a calculator module to calculate a hash value for the content of the data in order to compare the content of the data with the content of any existing data stored in the one or more storage mediums. 13. A storage system having a controller in communication with one or more storage mediums, the storage system comprising: an acquiring module to acquire one or more disc array group IDs to which a data is allocated, wherein the acquiring module acquires one or more medium IDs corresponding to the acquired one or more disc array group IDs;a power control module to power on one or more storage mediums corresponding to the acquired one or more medium IDs;a data transfer module to transfer the data to the one or more storage mediums which were powered on; anda comparison module to compare content of the data with content of any existing data stored in the one or more storage mediums;wherein the controller stores the content of the data to the one or more storage mediums which were powered on when the content of the data does not correspond to the existing data stored in the one or more storage mediums; andwherein the controller stores an information linking an identifier of the data with an identifier of the existing data stored in the one or more storage mediums that were powered on when the content of the data corresponds to the existing data stored in the one or more storage mediums. 14. The storage system according to the claim 13, wherein the power control module powers off the one or more storage mediums which were powered on following completion of the storing the information linking an identifier of the data with an identifier of the existing data stored in the one or more storage mediums. 15. The storage system according to the claim 13, wherein storage mediums other than the storage mediums which were powered on are in power off status. 16. The storage system according to the claim 13, wherein the power control module powers off the one or more storage mediums which were powered on following completion of the storing the content of the data. 17. The storage system according to the claim 13, wherein hash values of the existing data stored in the one or more storage mediums are managed in the storage system, the storage system further including:a calculator module to calculate a hash value for the content of the data in order to compare the content of the data with the content of any existing data stored in the one or more storage mediums.