Smart Solid State Drive And Method For Handling Critical Files

• US 20090043831A1
• Filed: 02/29/2008
• Published: 02/12/2009
• Est. Priority Date: 08/11/2007
• Status: Abandoned Application

• Current Assignee: Technology Properties Limited LLC
• Original Assignee: MCM Portfolio LLC
• Inventors: Venkidu, Arockiyaswamy, Ramiya Mothilal, Arunprasad, Antonopoulos, Nick, Iyer, Sree M.
• Application Number:
  US12/040,666
• Publication Number:
  US 20090043831A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0614 Improving the reliability of storage systems
• CPC Class Codes: G06F 3/0631 by allocating resources to storage systems
• CPC Class Codes: G06F 3/0643 Management of files
• CPC Class Codes: G06F 3/0673 Single storage device

Abstract

A method and apparatus for dynamically distributing data to an appropriate storage device based on the significance of the data. In one embodiment the method determines the significance of a data file using the format of the data file. The method also includes identifying a storage device and memory location of the storage device to write the data. In a software implementation, a computer system employs a filter driver and/or a device driver to identify and store data files. In another embodiment, a storage controller includes a state machine that initiates and executes firmware to determine the data file format and also the storage device location.

Claims

1. A filter driver, comprising:

means for determining if file data are critical, means for assigning file data storage location based upon critical status of the file data, and

means for notifying a file system driver of assigned file data storage location.

2. The filter driver of claim 1, wherein the critical status of the file data is determined based on content of the file data.

3. The filter driver of claim 1, wherein the critical status of the file data is determined based on the access time requirement of the file data.

4. The filter driver of claim 1, wherein the critical status of the file data is determined based on combining the critical nature of one or more members of the group comprising format of content of the file data, access time requirements of the file data, content of the file data, frequency of access of the file data, and wear level dependency of the data storage location.

5. The filter driver of claim 4, wherein the critical nature of the one or more members of the group is given a weight, and wherein the means for assigning file data storage is determined by artificial intelligence.

6. A method for storing file data in nonvolatile memory comprising:

accessing a filter driver wherein the accessing comprises;

determining if file data are critical,

assigning file data storage location based upon critical status of the file data, and

notifying a file system driver of assigned file data storage location.

7. The method of claim 6, wherein determining the critical status of the file data is based on determining content of the file data.

8. The method of claim 6, wherein determining the critical status of the file data is based on determining access time requirement of the file data.

9. The method of claim 6, wherein determining the critical status of the file data is based on determining combination of content of the file data and access time requirement of the file data.

10. A system for storing critical and non-critical data comprising:

a host,

the host in communication with a storage controller,

the storage controller comprising a state machine and associated memory,

the storage controller in communication with more than one non-volatile memories,

means for storing critical data in one or more of the non-volatile memories,

means for storing non-critical data in one or more of the non-volatile memories.

11. The system of claim 10, wherein the non-volatile memory is selected from the group comprising SLC memory, MLC memory, and hard disk memory.

12. The system of claim 10, wherein critical data is stored in non-volatile memory selected based on content of the file data.

13. The system of claim 10, wherein critical data is stored in non-volatile memory selected based on access time requirement of the file data.

14. The system of claim 10, wherein critical data is stored in non-volatile memory based on combination of content of the file data and access time requirement of the file data.

15. A method of storing critical data in one or more than one non-volatile memories comprising:

determining format of data,

determining if the format of data is critical, and

storing data in one or more non-volatile memories based on critical status of the format of data.

16. The method of claim 15 wherein the non-volatile memories are selected from the group comprising SLC memory, MLC memory, and hard disk memory.

17. A method of storing data in one or more of more than one non-volatile memories comprising:

computing data area of supported file system containing data,

storing data in one or more non-volatile memories if data is for file area,

determining if data is critical if data is not for file area,

storing critical data in one or more non-volatile memories, and

storing non-critical data in one or more non-volatile memories.

18. The method of claim 17, wherein non-volatile memories are selected from the group comprising SLC memory, MLC memory, and hard disk memory.

19. The method of claim 17, wherein determining if data is critical is based on content of the file data.

20. The method of claim 17, wherein determining if data is critical is based on access time requirement of the file data.

21. The method of claim 17, wherein determining if data is critical is based on combining content of the file data and access time requirement of the file data.

22. The method of claim 17, wherein determining if data is critical is based on one or more decision matrix tables.

23. A filter driver, comprising:

means for determining criticality of files,

means for assigning files data storage locations based upon criticality.

24. The filter driver of claim 23, wherein the criticality of files is determined based on content of the file data.

25. The filter driver of claim 23, wherein the criticality of files is determined based on the access time requirement of the file data.

26. The filter driver of claim 23, wherein the criticality of files is determined based on combining the critical nature of one or more members of the group comprising format of content of the file data, access time requirements of the file data, content of the file data, frequency of access of the file data, and wear level dependency of the data storage location.

27. The filter driver of claim 26, wherein the critical nature of the one or more members of the group is given a weight, and wherein the means for assigning file data storage is determined by artificial intelligence.