Data recovery systems

• US 7,565,596 B2
• Filed: 09/09/2005
• Issued: 07/21/2009
• Est. Priority Date: 09/09/2005
• Status: Expired due to Fees

• Current Assignee: The Invention Science Fund I, L.L.C. (Intellectual Ventures LLC)
• Original Assignee: Searete LLC (Intellectual Ventures LLC)
• Inventors: Jung, Edward K. Y., Ferren, Bran
• Primary Examiner(s): Abraham, Esaw T
• Application Number:
  US11/223,888
• Publication Number:
  US 20070058505A1
• Time in Patent Office: 1,411 Days
• Field of Search: 714/2, 714/6, 714/52, 714/704, 714/763, 714/784
• US Class Current: 714/763
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 2221/2143 Clearing memory, e.g. to prevent the data from being stolen
• CPC Class Codes: G11B 19/122 involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• CPC Class Codes: G11B 19/26 Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00195 using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
• CPC Class Codes: G11B 20/00253 wherein the key is stored on the record carrier
• CPC Class Codes: G11B 20/00608 wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
• CPC Class Codes: G11B 20/00782 wherein the usage restriction limits the number of times a program can be installed
• CPC Class Codes: G11B 20/00797 wherein the usage restriction limits the number of times a content can be reproduced, e.g. using playback counters
• CPC Class Codes: G11B 20/0084 wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 20/00876 wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry
• CPC Class Codes: G11B 20/00927 wherein said defects or errors are generated on purpose, e.g. intended scratches

Abstract

Embodiments of methods and systems for controlling access to information stored on memory or data storage devices are disclosed. In various embodiments, methods of retrieving information from a data storage device previously deactivated by modification or degradation of at least a portion of the data storage device are disclosed.

Claims

1. A data recovery device comprising:

a receptacle for receiving a data storage device;

a read head positionable within the receptacle to read data from an expired data storage device received within the receptacle, the expired data storage device including a non-degraded portion, the non-degraded portion including data of interest and read-support information not readable by a general purpose read device, and a degraded portion that prior to expiration included read-support information necessary for reading the data of interest with a general purpose read device;

a first sensor located on the read head for sensing data from the data storage device; and

a controller configured to control read head position to locate the read head proximate the non-degraded portion of the expired data storage device to permit the recovery of read-support information from one or more locations within the non-degraded portion of the expired data storage device.

2. The data recovery device of claim 1, wherein the controller is configured to recover read-support information from one or more locations within the non-degraded portion, wherein the read-support information is located at the one or more locations interspersed with the data of interest.

3. The data recovery device of claim 1, including a second sensor adapted to read information from a different type of data storage medium than said first sensor.

4. The data recovery device of claim 3, wherein the second sensor is adapted to read information from at least one of a radio frequency identification or a resonant circuit on the expired data storage device.

5. The data recovery device of claim 3, wherein the second sensor is an optical sensor or a magnetic sensor.

6. The data recovery device of claim 1, including a controller configured to control read head position to position the read head over a non-degraded portion of the expired data storage device that includes read-support information necessary for reading the data of interest encoded at a different spatial frequency or stored at a different level than the data of interest and to read the read-support information from the non-degraded portion of the expired data storage device.

7. The data recovery device of claim 1, wherein the first sensor is an optical sensor adapted to sense an optical signal from an optical data storage device or a magnetic sensor adapted to sense a magnetic signal from a magnetic data storage device.

8. The data recovery device of claim 7, including a second sensor adapted to sense information from an optical data storage medium at a different optical wavelength than the wavelength used by the first sensor, at a different depth level of the expired data storage device than is read by the first sensor, or from a different side of an optical data storage medium than is sensed by the first sensor.

9. The data recovery device of claim 1, wherein the controller is configured to recover the read-support information necessary for reading the data of interest from the non-degraded portion of the expired data storage device, wherein the read-support information is encoded at a different spatial frequency than the data of interest.

10. The data recovery device of claim 1, wherein the controller is configured to recover the read-support information from the non-degraded portion of the expired data storage device, wherein the non-degraded portion of the expired data storage device includes read-support information necessary for reading the data of interest stored at a different level than the data of interest.

11. A data recovery device comprising:

a receptacle for receiving a data storage device;

a read head positionable within the receptacle to read data from an expired data storage device received within the receptacle, wherein the expired data storage device is unreadable by a general purpose read device but readable by the data recovery device;

a first sensor located on the read head for sensing data from the data storage device; and

a controller configured to;

control the position of the read head to locate the read head over at least one degraded data portion of the expired data storage device; and

control at least one of operation of the first sensor or processing of sensed data to recover data from at least a portion of the expired data storage device.

12. The data recovery device of claim 11, wherein the controller is configured to scan the read head over the degraded data portion at a reduced scan speed relative to the scan speed of the general purpose read device, wherein data in the degraded data portion is readable at the reduced scan speed but not at the scan speed of the general purpose read device.

13. The data recovery device of claim 11, wherein the controller is configured to perform a moving average on data read from the degraded data portion, the degraded data portion having a reduced signal-to-noise ratio relative to the signal-to-noise ratio of the data portion prior to degradation, to produce an improved signal-to-noise ratio in the data signal.

14. The data recovery device of claim 11, wherein the controller is configured to use an error-detection code to detect one or more errors from data read from the degraded data portion, the degraded data portion having an increased bit error rate relative to the bit error rate of the data portion prior to degradation.

15. The data recovery device of claim 14, wherein the controller is configured to use an error-correction code to correct detected errors in data read from the degraded data portion.

16. The data recovery device of claim 14, wherein the error-detection code includes at least one of a parity function or a Reed-Solomon code.

17. The data recovery device of claim 11, wherein the controller is configured to control read head position to locate the read head over two or more degraded data portions of the expired data storage device and to average two or more degraded data sets read from the two or more data portions to produce a data set having an improved signal-to-noise ratio.

18. A data recovery device comprising:

a receptacle for receiving a data storage device;

a read head positionable within the receptacle to read data from an expired data storage device received within the receptacle;

a first sensor located on the read head for sensing data from the data storage device;

a second sensor for sensing data from the data storage device; and

a controller configured to control at least one operation of the first sensor, operation of the second sensor, or processing of sensed data to recover data from at least a portion of the expired data storage device.

19. The data recovery device of claim 18, wherein the first sensor is an optical sensor for sensing an optical signal from the expired data storage device.

20. The data recovery device of claim 19, wherein the second sensor is an optical sensor for sensing an optical signal from the expired data storage device at a different optical wavelength than the wavelength sensed by the first sensor.

21. The data recovery device of claim 19, wherein the second sensor is an optical sensor for sensing information from the expired data storage device at a different depth level of the expired data storage device than is read by the first sensor.

22. The data recovery device of claim 19, wherein the second sensor is an optical sensor for sensing information from a different side of the expired data storage device than is sensed by the first sensor.

23. The data recovery device of claim 19, wherein the second sensor is a magnetic sensor.

24. The data recovery device of claim 18, wherein the first sensor is a magnetic sensor for sensing a magnetic signal from the expired data storage device.

25. The data recovery device of claim 18, wherein the second sensor is a sensor for reading information from a different type of data storage medium than said first sensor.

26. The data recovery device of claim 25, wherein the second sensor is a sensor for reading information from at least one radio frequency identification on the expired data storage device.

27. The data recovery device of claim 25, wherein the second sensor is a sensor for reading information from at least one resonant circuit on the expired data storage device.

28. The data recovery device of claim 25, wherein the second sensor is an optical sensor.

29. The data recovery device of claim 25, wherein the second sensor is a magnetic sensor.