Method of distributed recording whereby the need to transition to a second recording device from a first recording device is broadcast by the first recording device

• US 20020188769A1
• Filed: 08/02/2002
• Published: 12/12/2002
• Est. Priority Date: 05/12/1999
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Stone, Glen David, Smyers, Scott David, Fairman, Bruce Alan, Swidler, Thomas Ulrich
• Granted Patent: US 6,859,846 B2
• Time in Patent Office: Days
• US Class Current: 710/8
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0613 in relation to throughput
• CPC Class Codes: G06F 3/0629 Configuration or reconfiguration of storage systems
• CPC Class Codes: G06F 3/0643 Management of files
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD
• CPC Class Codes: H04L 12/40058 Isochronous transmission
• CPC Class Codes: H04L 12/40117 Interconnection of audio or video/imaging devices home automation networks H04L12/2803; bitstream network arrangements specially adapted for distribution of digital video signals H04N7/24

Abstract

An automatically configuring storage array includes a plurality of media storage devices coupled together within a network of devices. Preferably, the network of devices is an IEEE 1394-2000 serial bus network of devices. The media storage devices are utilized to record and retrieve streams of data transmitted within the network of devices. The media storage devices communicate with each other in order to store and retrieve streams of data over multiple media storage devices, if necessary. When a record or playback command is received by any one of the media storage devices, the media storage devices send control communications between themselves to ensure that the stream of data is recorded or transmitted, as appropriate. Control of the record or transmit operation is also transferred between the media storage devices in order to utilize the full capacity of the available media storage devices. Preferably, streams of data are recorded utilizing redundancy techniques. An internal file system is included within each media storage device. A file table associated with each recorded stream of data is stored within the internal file system of each media storage device to facilitate search and retrieval of the recorded streams of data throughout the media storage devices. Preferably, the media storage devices accept control instructions directly from devices within the network. Alternatively, a control device is utilized to provide a control interface between the media storage devices and the other devices within the network.

Claims

1. A method of recording data within an automatically configuring storage array including a plurality of media storage devices comprising:

a. receiving a record command to record a stream of data at one of the media storage devices;

b. determining a next available media storage device independent of the record command;

c. recording the stream of data on media within the next available media storage device, thereby forming a recorded stream of data;

d. recording a file table associated with the recorded stream of data within the next available media storage device, wherein the file table includes identifying and pointing information about the recorded stream of data;

e. sending control communications from the next available media storage device to other media storage devices within the automatically configuring storage array; and

f. repeating b-e when the next available media storage device does not have capacity to record remaining portions of the stream of data, until the stream of data is fully recorded.

2. The method as claimed in claim 1 wherein control communications are sent to identify the next available media storage device when recording responsibility is transferred from a current recording media storage device to the next available media storage device.

3. The method as claimed in claim 1 wherein the control communications and the stream of data are sent over a serial bus that substantially complies with an IEEE 1394 standard.

4. The method as claimed in claim 1 wherein each media storage device that stores a portion of the recorded stream of data includes the file table associated with the portion of the recorded stream of data stored on that media storage device.

5. The method as claimed in claim 4 wherein the identifying and pointing information within the file table includes a correlation between each frame within the portion of the recorded stream of data and a storage location of the frame within the media storage device, a location of a previously recorded portion of the recorded stream of data, and a location of a subsequently recorded portion of the recorded stream of data.

6. The method as claimed in claim 1 wherein determining the next available media storage device is performed by sending a broadcast message to the plurality of media storage devices requesting response from each media storage device that has available storage capacity and selecting the next available media storage device from those media storage devices that respond to the broadcast message.

7. The method as claimed in claim 6 wherein the next available media storage device is selected from the media storage devices that respond to the broadcast message based on the media storage device that has the most available storage capacity.

8. The method as claimed in claim 6 wherein the next available media storage device is selected from the media storage devices that respond to the broadcast message based on the media storage device that is a first to respond to the broadcast message.

9. The method as claimed in claim 1 wherein the record command is received from a remote controller.

10. The method as claimed in claim 1 wherein the stream of data is transmitted on a data isochronous channel.

11. The method as claimed in claim 10 wherein the control communications include a real time component transmitted on a control isochronous channel.

12. The method as claimed in claim 11 wherein the control communications include a non-real time component transmitted by asynchronous commands.

13. The method as claimed in claim 1 further comprising recording redundant information regarding the stream of data which is used to reconstruct lost data within the recorded stream of data.

14. The method as claimed in claim 1 wherein each frame within the recorded stream of data is identified by the elapsed time from the start of the recorded stream of data to the frame, wherein the elapsed time is measured in hours, minutes, seconds and frames.

16. The method as claimed in claim 15 wherein control communications are sent to identify the next available media storage device when recording responsibility is transferred from a current recording media storage device to the next available media storage device.

17. The method as claimed in claim 15 wherein the control communications and the stream of data are sent over a serial bus that substantially complies with an IEEE 1394 standard.

18. The method as claimed in claim 15 wherein the identifying and pointing information within the file table includes a correlation between each frame within the portion of the recorded stream of data and that frames'"'"' storage location within the media storage device, a location of a previously recorded portion of the recorded stream of data, and a location of a subsequently recorded portion of the recorded stream of data.

19. The method as claimed in claim 15 wherein determining the next available media storage device is performed by sending a broadcast message to the plurality of media storage devices requesting response from each media storage device that has available storage capacity and selecting the next available media storage device from those media storage devices that respond to the broadcast message.

20. The method as claimed in claim 19 wherein the next available media storage device is selected from the media storage devices that respond to the broadcast message based on the media storage device that has the most available storage capacity.

21. The method as claimed in claim 19 wherein the next available media storage device is selected from the media storage devices that respond to the broadcast message based on the media storage device that is a first to respond to the broadcast message.

15. A method of recording data within an automatically configuring storage array including a plurality of media storage devices comprising:

a. receiving a record command to record a stream of data at one of the media storage devices;

b. determining a next available media storage device independent of the record command;

c. recording the stream of data on media within the next available media storage device, thereby forming a recorded stream of data;

d. recording a file table associated with the recorded stream of data within the next available media storage device, wherein the file table is stored on and maintained by the next available media storage device and includes identifying and pointing information about the recorded stream of data;

e. sending control communications from the next available media storage device to other media storage devices within the automatically configuring storage array; and

f. repeating b-e when the next available media storage device does not have capacity to record remaining portions of the stream of data, until the stream of data is fully recorded, wherein each media storage device that stores a portion of the recorded stream of data includes the file table associated with the portion of the recorded stream of data stored on that media storage device.

22. An automatically configuring storage array within a network of devices including data source devices and data reception devices, the automatically configuring storage array including a plurality of distributed intelligent media storage devices having ability to automatically configure themselves and record a received stream of data over multiple media storage devices, thereby forming a recorded stream of data, wherein each media storage device that stores a portion of the recorded stream of data includes a file table associated with the portion of the recorded stream of data for identifying and pointing to portions of the recorded stream of data stored on different media storage devices.

23. The automatically configuring storage array as claimed in claim 22 wherein the file table associated with the portion of the recorded stream of data includes a correlation between each frame within the portion of the recorded stream of data and a storage location of the frame within the media storage device, a location of a previously recorded portion of the recorded stream of data, and a location of a subsequently recorded portion of the recorded stream of data.

24. The automatically configuring storage array as claimed in claim 22 wherein the recorded stream of data is recorded utilizing redundancy recording techniques.

25. The automatically configuring storage array as claimed in claim 22 further comprising a controller coupled to the media storage devices to initiate record and transmit operations.

26. The automatically configuring storage array as claimed in claim 22 wherein the media storage devices include one or more hard disk drives.

27. The automatically configuring storage array as claimed in claim 22 wherein the automatically configuring storage array is formed within a serial bus network of devices that substantially complies with an IEEE 1394 standard.

29. The automatically configuring storage array as claimed in claim 28 wherein the file table associated with the portion of the recorded stream of data includes a correlation between each frame within the portion of the recorded stream of data and a storage location of the frame within the media storage device, a location of a previously recorded portion of the recorded stream of data, and a location of a subsequently recorded portion of the recorded stream of data.

30. The automatically configuring storage array as claimed in claim 28 wherein the recorded stream of data is recorded utilizing redundancy recording techniques.

31. The automatically configuring storage array as claimed in claim 28 further comprising a controller coupled to the media storage devices to initiate record, playback and transmit operations.

32. The automatically configuring storage array as claimed in claim 28 wherein the media storage devices include one or more hard disk drives.

33. The automatically configuring storage array as claimed in claim 28 wherein the automatically configuring storage array is formed within a serial bus network of devices that substantially complies with an IEEE 1394 standard.

35. The method as claimed in claim 34 wherein the next available media storage device is selected from the media storage devices that respond to the broadcast message based on the media storage device that has the most available storage capacity.

36. The method as claimed in claim 34 wherein the next available media storage device is selected from the media storage devices that respond to the broadcast message based on the media storage device that is a first to respond to the broadcast message.

38. The network of devices as claimed in claim 37 wherein the file table associated with the portion of the recorded stream of data includes a correlation between each frame within the portion of the recorded stream of data and a storage location of the frame within the media storage device, a location of a previously recorded portion of the recorded stream of data, and a location of a subsequently recorded portion of the recorded stream of data.

39. The network of devices as claimed in claim 37 wherein the recorded stream of data is recorded utilizing redundancy recording techniques.

40. The network of devices as claimed in claim 37 further comprising a controller coupled to the media storage devices to initiate record and transmit operations.

41. The network of devices as claimed in claim 37 wherein the media storage devices include one or more hard disk drives.

42. The network of devices as claimed in claim 37 wherein the network of devices is formed by a serial bus network of devices that substantially complies with an IEEE 1394 standard.

28. An automatically configuring storage array within a network of devices including data source devices and data reception devices, the automatically configuring storage array including a plurality of distributed intelligent media storage devices having ability to automatically configure themselves and record a received stream of data over multiple media storage devices, thereby forming a recorded stream of data, and to automatically retrieve and playback the recorded stream of data, wherein each media storage device that stores a portion of the recorded stream of data includes a file table associated with the portion of the recorded stream of data for identifying and pointing to portions of the recorded stream of data stored on different media storage devices.

34. A method of recording data within an automatically configuring storage array including a plurality of media storage devices comprising:

a. receiving a record command to record a stream of data at one of the media storage devices;

b. determining a next available media storage device independent of the record command by sending a broadcast message to the plurality of media storage devices requesting response from each media storage device that has available storage capacity and selecting the next available media storage device from those media storage devices that respond to the broadcast message;

c. recording the stream of data on media within the next available media storage device, thereby forming a recorded stream of data;

d. recording a file table associated with the recorded stream of data within the next available media storage device, wherein the file table includes identifying and pointing information about the recorded stream of data;

e. sending control communications from the next available media storage device to other media storage devices within the automatically configuring storage array; and

f. repeating b-e when the next available media storage device does not have capacity to record remaining portions of the stream of data, until the stream of data is fully recorded.

37. A network of devices comprising:

a. a source device for providing a stream of data; and

b. an automatically configuring storage array coupled to the source device, the automatically configuring storage array including a plurality of distributed intelligent media storage devices having ability to automatically configure themselves and record the received stream of data over multiple media storage devices, thereby forming a recorded stream of data, wherein each media storage device that stores a portion of the recorded stream of data includes a file table associated with the portion of the recorded stream of data for identifying and pointing to portions of the recorded stream of data stored on different media storage devices.

43. A distributed file table representing storage locations corresponding to a recorded stream of data, the distributed file table including one or more file tables, wherein each file table is associated with a portion of the recorded stream of data stored on one of a plurality of distributed intelligent media storage devices within a network of devices and includes identifying information about the portion of the recorded stream of data on the media storage device and pointing information about other portions of the recorded stream of data on different media storage devices, further wherein each file table is maintained by and recorded onto the media storage device on which the associated portion of the recorded stream of data is recorded.

44. The distributed file table as claimed in claim 43 wherein the file table associated with the portion of the recorded stream of data includes a correlation between each frame within the portion of the recorded stream of data and a storage location of the frame within the media storage device, a location of a previously recorded portion of the recorded stream of data, and a location of a subsequently recorded portion of the recorded stream of data.

45. The distributed file table as claimed in claim 43 further comprising a controller coupled to the media storage device to maintain and record the information included within the file table corresponding to the media storage device.