SYSTEM FOR OPTIMIZING THE TRANSFER OF STORED CONTENT IN RESPONSE TO A TRIGGERING EVENT

• US 20100228799A1
• Filed: 03/05/2009
• Published: 09/09/2010
• Est. Priority Date: 03/05/2009
• Status: Active Grant

• Current Assignee: Western Digital Israel Limited (Western Digital Corporation)
• Original Assignee: SanDisk IL Ltd. (Western Digital Corporation)
• Inventors: Goodman, Daniel Isaac, Hahn, Judah Gamliel, Hutton, Henry
• Granted Patent: US 9,164,700 B2
• Time in Patent Office: Days
• US Class Current: 707/822
• CPC Class Codes: G06F 16/13 File access structures, e.g. distributed indices arrangements of input from, or output to, record carriers G06F3/06
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0643 Management of files
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

A system is set forth that includes storage, a first file system, a second file system, and a processing system. The first file system manages one or more files and/or directories on the storage, while the second file system manages content of one or more further files on the storage. The processing system is responsive to a triggering event. The processing system responds to the triggering event by re-mapping content from the second file system to the first file system while retaining the content at its original physical location on the storage so that the content is accessible through the first file system from its original physical location on the storage.

Claims

1. A storage device with file system mapping, comprising:

a native file system with one or more files and/or directories;

a loop file with one or more further file;

control logic operative to interface with a processing system and retain in place selected data of the further file while the processing system re-maps the selected data from the loop file to a file in the native file system so that access to the selected data is provided through the native file system.

2. The storage device of claim 1, wherein the native file system is organized as a FAT32 file system.

3. The storage device of claim 1, further comprising memory management code that is executable to respond to a triggering event by re-mapping file allocation extents for the selected data of the further file so that the selected data is removed from the loop file and inserted into the native file system while retaining the selected data at its original physical location on the storage device for access through the native file system.

4. A system comprising:

storage;

a first file system for managing one or more file and/or directory on the storage;

a second file system for managing content of one or more further files on the memory storage;

a processing system operative, in response to a triggering event, to re-map content from the second file system to the first file system while retaining the content at its original physical location on the storage so that the content is accessible through the first file system from its original physical location on the storage.

5. The system of claim 4, wherein the processing system is operative to re-map content of a given file and wherein the processing system is operative to re-map an entirety of the content of the given file.

6. The system of claim 4, wherein the processing system is operative to re-map less than all of the content of the given file to the first file system thereby leaving residual content in the second file system, and wherein the processing system is operative to deallocate the residual content from the second file system so that physical storage occupied by the residual content is made available for allocation by the processing system to the first and/or second file systems.

7. The system of claim 4, wherein the storage comprises non-volatile memory.

8. The system of claim 7, wherein both the first and second file systems are present on the non-volatile memory.

9. The system of claim 8, wherein the processing system is integrated with the non-volatile memory.

10. The system of claim 4, further comprising memory management code that is executable by the processing system to re-map the content from the second file system to the first file system in response to the triggering event.

11. The system of claim 10, wherein the memory management code is stored on the storage.

12. The system of claim 11, wherein the processing system is integrated with the storage.

13. The system of claim 4, wherein the second file system comprises a loop file.

14. The system of claim 13, wherein the first file system comprises a native file system.

15. The system of claim 4, wherein the processing system logically re-maps the content from the second file system to the first file system by changing file allocation extents in the first and second file systems so that the content is added to a file of the first file system and removed from a file of the second file system.

16. The system of claim 4, wherein the processing system is operative to physically re-map the content by switching mappings between logical block addresses and physical block addresses of the storage.

17. The system of claim 4, wherein the content comprises media file data.

18. The system of claim 17, wherein the triggering event comprises a billing event.

19. The system of claim 17, wherein the triggering event comprises a timing event.

20. A method comprising:

managing one or more files and/or directories on storage using a first file system;

managing content of one or more further files on the storage using a second file system;

responding to a triggering event by re-mapping content from the second file system to the first file system while retaining the content at its original physical location on the storage so that the content is accessible through the first file system from its original physical location on the storage.

21. The method of claim 20, wherein the content is stored in a given file of the second file system, and wherein an entirety of the content of the given file is re-mapped to the first file system.

22. The method of claim 20, wherein the re-mapping comprises logically re-mapping content of a given file from the second file system to the first file system by changing file allocation extents in the first and second file systems so that the content of the given file is added to a file of the first file system and removed from the second file system.

23. The method of claim 20, wherein the re-mapping comprises physically re-mapping content of a given file by switching mappings between logical block addresses and physical block addresses of the storage for the content of the given file of the second file system.