System, apparatus and method for controlling a storage device

• US 20050044330A1
• Filed: 07/26/2004
• Published: 02/24/2005
• Est. Priority Date: 07/28/2003
• Status: Abandoned Application

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Inventors: Harkabi, Dan, Elazar, Gidon, Weingarten, Nehemiah
• Application Number:
  US10/899,260
• Publication Number:
  US 20050044330A1
• Time in Patent Office: Days
• US Class Current: 711/154
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0622 in relation to access
• CPC Class Codes: G06F 3/0637 Permissions
• CPC Class Codes: G06F 3/0643 Management of files
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

Various embodiments include a system, apparatus and method for a computing device to communicate with a storage device through read/write operations. In some embodiments described, the computing device may be a personal computer. In some embodiments, the storage device may be a removable storage device. In some embodiments the computing device may communicate to the storage device using an interface that is operable with the USB standard. In some embodiments the computing device does not have administrative permissions. Other embodiments are described.

Claims

1. An apparatus for communicating with a host device, comprising:

an interface for transmitting and receiving data to a host device;

a storage controller associated with the interface;

storage media associated with said storage controller;

the storage controller being configured to;

detect an access attempt by the host device to a designated region in the storage media, the access attempt having a control portion and a data portion;

extract at least a datum from within said data portion;

interpret said extracted at least a datum as at least a control message for the storage controller; and

execute at least an operation in the storage controller responsive to the at least a control message from the host device.

2. The apparatus of claim 1 wherein the storage controller is further configured to:

receive data associated with said at least a control message from the host device; and

responsive to said at least a control message, at least store data in certain locations in the storage media.

3. The apparatus of claim 1 wherein the storage controller is further configured to:

receive a read access attempt for data to said designated region in the storage media following the execution of the at least an operation associated with said at least a control message from the host device; and

responsive to the read access attempt execute at least an operation in the storage device.

4. The apparatus of claim 3, wherein the at least an operation executed in the storage device at least retrieves one datum from the storage media for transmission to the host device.

5. The apparatus of claim 3, wherein the storage device interfaces with the host device which is not operating under administrative permissions.

6. The apparatus of claim 1 wherein said interface, storage controller and storage media together comprise a removable flash storage device.

7. The apparatus of claim 1 wherein said interface is operable with the USB standard.

8. A computer program product associated with a removable storage device having an interface for communication to a host device, comprising:

storage application computer program code for executing a storage application on a controller on a removable storage device, the storage application program code being responsive to at least a command to the storage device by an access attempt from the host device to a designated region in the storage media of the storage device, the access attempt having a control portion and a data portion, the at least a command being within the data portion.

9. The computer program product of claim 8, further comprising:

application computer program code for executing an application program on a host device, which, when executing the application program, will attempt access to files recognized to be located on the storage device.

10. The computer program product of claim 9, further comprising:

computer program code for executing a client channel application layer on the host device for receiving messages from the application program and for transmitting messages to the storage device.

11. The computer program product of claim 9, further comprising:

computer program code for executing a server channel application layer on the storage device for receiving messages from the storage application program and for transmitting messages to the host device.

12. The computer program product of claim 10, further comprising:

computer program code for executing a server channel application layer on the storage device for receiving messages from the storage application program and for transmitting messages to the host device.

13. The computer program product of claim 12, wherein

the host device and the storage device communicate by transmitting and receiving data from the client channel application layer and the server channel application layer.

14. The computer program product of claim 9 wherein the application program executing on the host device does not have administrative permissions.

15. The computer program product of claim 9, wherein

said application program is executable on a host device which is a computer having a USB port and said interface for communication to the host device is operable with the USB standard.

16. A method for communicating between a host device and a storage device, comprising the steps of:

providing an interface for transmitting and receiving data between the host device and the storage device;

providing a storage device, comprising;

a storage controller associated with the interface; and

storage media associated with said storage controller;

detecting an access attempt by the file system of the host device to a designated region in the storage media, the access attempt having a control portion and a data portion;

extracting at least a datum from within said data portion;

interpreting said extracted datum as at least a control message for the storage controller; and

executing at least an operation in the storage controller responsive to the at least a control message from the host device.

17. The method of claim 16, further comprising the steps of:

receiving data associated with said at least a control message from the host device; and

responsive to said at least a control message, at least storing data in certain locations in the storage media.

18. The method of claim 16, further comprising the steps of:

receiving a read access attempt for data to said designated region in the storage media following the execution of the at least an operation associated with said at least a control message from the host device; and

responsive to the read access attempt executing at least an operation in the storage device.

19. The method of claim 18 wherein the step of executing at least an operation further comprises the steps of:

at least retrieving one datum from the storage media for transmission to the host device.

20. A method for communicating between a host device and a storage device, comprising the steps of:

utilizing at least one or more Logical Block Addresses in the storage device for an access attempt by the host device as at least a communications file and for access by the storage device;

detecting an access attempt by the file system of the host device to the at least a communications file, the access attempt having a control portion and a data portion;

extracting at least a datum from within said data portion;

interpreting said at least a datum as a at least a control message from the host device to the storage device; and

executing at least an operation in the storage device responsive to the at least a control message from the host device.

21. The method of claim 20, further comprising the steps of:

receiving data associated with said at least a control message from the host device; and

responsive to said at least a control message, at least storing data in certain locations in the storage device.

22. The method of claim 20, further comprising the steps of:

receiving a read access attempt to the communications file for data associated with the control message from the host device; and

responsive to the read access attempt associated with the control message, executing at least an operation in the storage device.

23. The method of claim 22 wherein the step of executing at least an operation in the storage device further comprises the steps of at least retrieving one datum for transmission from the storage device to the host device.

24. An apparatus for communicating with a host device, comprising:

an interface for transmitting and receiving data to a host device;

a storage controller associated with the interface;

storage media associated with said storage controller;

the storage controller being configured to;

utilize at least one or more Logical Block Addresses in the storage device for access by the host computer as at least a communications file and for access by the storage device;

detect an access attempt by the file system of the host device to the at least a communications file, the access attempt having a control portion and a data portion;

extract at least a datum from within said data portion;

interpret said extracted at least a datum as at least a control message for the storage controller; and

execute at least an operation in the storage controller responsive to the at least a control message from the host device.

25. The apparatus of claim 24 wherein the storage controller is further configured to:

receive data associated with said at least a control message from the host device; and

responsive to the at least a control message, at least store data in certain locations in the storage media.

26. The apparatus of claim 24, wherein the storage controller is further configured to:

detect a read access attempt for data to the communication file following the execution of the at least an operation associated with the at least a control message from the host device; and

responsive to the read access attempt execute at least an operation in the storage device.

27. The apparatus of claim 24, wherein the operation executed in the storage device retrieves at least one datum from the storage media for transmission to the host device.

28. The apparatus of claim 24, wherein the host device does not have administrative permissions.

29. The apparatus of claim 24 wherein said interface, storage controller and storage media together comprise a removable flash storage device.

30. The apparatus of claim 24 wherein said interface is operable with the USB standard.

31. A system, comprising:

a host device executing an application program;

a storage device in communication with the host device executing a storage application program;

a communication file recognized to be located on the storage device and accessible to the file system of the host device;

wherein the storage device detects an access attempt to the communications file by the file system including a control portion and a data portion and interprets at least a datum from the data portion of the access attempt as a control message from the host device and the storage device extracts said at least a datum from the data portion and executes at least an operation responsive to the control message from the host device.

32. The system of claim 31 wherein the application program executing on the host device does not have administrative permissions.

33. The system of claim 31 wherein the storage device is in communication with the host device over a communications interface that is operable with the USB standard.

34. The system of claim 31 and further comprising:

a storage controller on the storage device; and

storage media on the storage device, operable to store and retrieve data responsive to said storage controller.

35. The system of claim 31 and further comprising:

a client channel application layer executing on the host device and in communication with the application program and the file system; and

a server channel application layer executing on the storage device and in communication with the storage application program , wherein the server channel application layer performs the at least the step of detecting an access attempt to the communication file by the file system;

the host device and the storage device communicating by transmitting and receiving data from the client channel application layer and the server channel application layer.

36. A method for communication between a host device and a storage device, comprising the steps of:

providing a communications interface for communicating to the storage device;

executing a host application program on the host device, the host device application program executing without administrative privileges;

executing a storage application program on the storage device;

executing a client channel application layer on the host device for receiving messages from the host application program and transmitting the messages to the storage device;

executing a server channel application layer on the storage device for receiving messages from the host device and for transmitting messages to the storage application program;

detecting an access attempt to a designated region in the storage device in the server application channel layer, the access attempt having a control portion and a data portion;

extracting at least one datum from the data portion of the access attempt;

interpreting at least one datum as at least a control message to the storage application program;

transmitting the at least a control message to the storage application program from the server application channel layer; and

executing at least an operation in the storage application program responsive to the at least a control message.

37. An apparatus, comprising:

interface means for transmitting and receiving data;

storage control means associated with said interface means;

storage media means for storing and retrieving data responsive to said interface means;

said storage control means being configured to;

detect an access attempt to a designated region of said storage media means, the access attempt comprising a control portion and a data portion;

extract at least a datum from within said data portion;

interpret said at a least a datum as at least a control message from a host device; and

execute at least an operation responsive to the at least a control message from the host device.

38. The apparatus of claim 37, wherein said interface means comprises means operable with the USB standard.

39. The apparatus of claim 37, wherein said storage media means comprises non-volatile storage means.

40. The apparatus of claim 37, wherein said host device is a personal computer.

41. The apparatus of claim 37, wherein said storage control means is further configured to:

utilize at least one or more Logical Block Addresses in the storage media means for access by the host device as at least a communications file and for access by the storage control means.