Systems and Methods for Efficient Data Refresh in a Storage Device

1 . A data storage system, the data storage system comprising:

a data processing circuit operable to:

receive a pre-processed encoded data set derived from a location on a storage medium;

apply a data processing algorithm to the pre-processed encoded data set to recover the original encoded data set, wherein the original encoded data set includes user data and encoding information;

provide the user data to a requesting device; and

a data write circuit operable to re-write the recovered original encoded data set to the storage medium.

2 . The data storage system of claim 1 , wherein the data write circuit further comprises:

a data encoding circuit operable to encode the user data to yield the original encoded data set; and

wherein the data write circuit is further operable to initially write the original encoded data set to the storage medium.

3 . The data storage system of claim 2 , wherein the data encoding circuit applies a low density parity check encoding algorithm.

4 . The data storage system of claim 2 , wherein the data processing circuit further comprises:

a refresh determination circuit operable to determine that a refresh of the pre-processed encoded data is warranted; and

wherein the data write circuit further includes:

a selector circuit operable to select the recovered original encoded data set provided from the data processing circuit as a write data output when it is determined that a refresh of the pre-processed encoded data is warranted.

5 . The data storage system of claim 4 , wherein the refresh determination circuit is operable to determine that a refresh of the pre-processed encoded data is warranted based upon a condition, and wherein the condition is selected from a group consisting of: exceeding a defined number of reads of the pre-processed encoded data since a last write of the pre-processed encoded data; exceeding a defined time period since the last write of the pre-processed encoded data; exceeding a defined level of inter-cell interference evident in the pre-processed encoded data; exceeding a defined level of adjacent track interference evident in the pre-processed encoded data; and exceeding a number of iterations of a data decoding algorithm required to yield the original encoded data set.

6 . The data storage system of claim 4 , wherein upon determination that a refresh of the pre-processed encoded data is warranted, data encoding circuit does not re-encode the user data to yield the original encoded data set.

7 . The data storage system of claim 1 , wherein the data processing algorithm includes a low density parity check decoding algorithm.

8 . The data storage system of claim 1 , wherein the storage system further comprises:

the storage medium, wherein the storage medium is selected from a group consisting of: a solid state storage medium, a magnetic storage medium, and an optical storage medium.

9 . The data storage system of claim 1 , wherein the data storage system is implemented as part of an integrated circuit.

10 . A method for data refresh in a storage device, the method comprising:

writing an original encoded data set to a storage medium, wherein the original encoded data set includes user data and encoding information;

accessing a pre-processed encoded data set from a storage medium;

applying a data decoding algorithm to the pre-processed encoded data set to recover the original encoded data set;

providing the user data to a requesting device; and

re-writing the recovered original encoded data set to the storage medium.

11 . The method of claim 10 , the method further comprising:

encoding the user data to yield the original encoded data set.

12 . The method of claim 11 , wherein encoding the user data set includes applying a low density parity check encoding algorithm to the user data.

13 . The method of claim 11 , the method further comprising:

determining that a refresh of the pre-processed encoded data is warranted; and

selecting the recovered original encoded data set as a write data output when it is determined that a refresh of the pre-processed encoded data is warranted.

14 . The method of claim 13 , wherein determining that a refresh of the pre-processed encoded data is warranted is based upon a condition, and wherein the condition is selected from a group consisting of: exceeding a defined number of reads of the pre-processed encoded data since a last write of the pre-processed encoded data; exceeding a defined time period since the last write of the pre-processed encoded data; exceeding a defined level of inter-cell interference evident in the pre-processed encoded data; exceeding a defined level of adjacent track interference evident in the pre-processed encoded data; and exceeding a number of iterations of a data decoding algorithm required to yield the original encoded data set.

15 . The method of claim 13 , wherein upon determination that a refresh of the pre-processed encoded data is warranted, re-encoding of the user data to yield the original encoded data set.

16 . The method of claim 10 , wherein the data decoding algorithm includes a low density parity check decoding algorithm.

17 . The method of claim 10 , wherein the storage medium is selected from a group consisting of: a solid state storage medium, a magnetic storage medium, and an optical storage medium.

18 . A storage device, the storage device comprising:

a data encoding circuit operable to encode a user data set to yield an original encoded data set, wherein the original encoded data set includes the user data set and encoding information;

a storage medium;

a data write circuit operable to write the original encoded data set to the storage medium;

a data processing circuit operable to:

receive a pre-processed encoded data set corresponding to the original encoded data set;

apply a data decoding algorithm to the pre-processed encoded data set to recover the original encoded data set;

provide the user data to a requesting device; and

wherein the data write circuit operable to re-write the recovered original encoded data set to the storage medium.

19 . The storage device of claim 18 , wherein the storage medium is selected from a group consisting of: a solid state storage medium, a magnetic storage medium, and an optical storage medium.

20 . The storage device of claim 18 , wherein the data processing circuit further comprises:

a refresh determination circuit operable to determine that a refresh of the pre-processed encoded data is warranted; and

wherein the data write circuit further includes:

a selector circuit operable to select the recovered original encoded data set provided from the data processing circuit as a write data output when it is determined that a refresh of the pre-processed encoded data is warranted.