Apparatus, system, and method for communicating with a device within a computer system

• US 8,214,473 B1
• Filed: 04/16/2004
• Issued: 07/03/2012
• Est. Priority Date: 04/16/2004
• Status: Active Grant

• Current Assignee: Prisa Networks Incorporated (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Wexler, Martin H.
• Primary Examiner(s): Nguyen, Quang N.
• Application Number:
  US10/825,811
• Time in Patent Office: 3,000 Days
• Field of Search: 709/203, 709/217, 709/218, 709/219, 709/223, 709/224, 709/225, 710/5, 370/389
• US Class Current: 709/223
• CPC Class Codes: G06F 9/4411 Configuring for operating with peripheral devices; Loading of device drivers
• CPC Class Codes: H04L 41/04 Network management architectures or arrangements
• CPC Class Codes: H04L 41/344 Out-of-band transfers

Abstract

An apparatus, system, and method establish communication with a target device within a computer system using an in-band communication protocol. Based on identification information received from the target device in accordance with a standard information exchange convention, a device manager identifies a nonstandard information exchange convention. A handler loaded into the device manager facilitates communication between a device caller and the target device using the nonstandard information exchange convention.

Claims

1. A method for communicating with a target device, the method comprising:

receiving identification information of a target device in accordance with a standard information exchange convention defined by a published standard;

generating a class identifier based on the identification information;

using the class identifier to identify a nonstandard information exchange convention that is not defined by the published standard;

using the nonstandard information exchange convention or the class identifier to identify a target device handler;

determining the availability of the identified target device handler;

based on a positive determination, using the identified target device handler associated with the target device to communicate with the target device;

wherein communicating with the target device comprises exchanging target device information in accordance with the nonstandard information exchange convention;

based on a negative determination, loading a generic device handler and attempting communicating with the target device using the standard information exchange convention.

2. A method in accordance with claim 1, wherein the communicating with the target device comprises receiving device information complying with the nonstandard information exchange convention.

3. A method in accordance with claim 2, wherein the target device is a memory device and the device information comprises a capacity of the memory device.

4. A method in accordance with claim 2, wherein the target device is part of a memory device and the device information comprises a logical unit number (LUN) of the target device.

5. A method in accordance with claim 1, wherein the standard information exchange convention is in accordance with Small Computer System Interface (SCSI) protocol.

6. A method in accordance with claim 5, wherein receiving the identification information comprises:

receiving Mode Page 83H transmitted from the target device in accordance with the Small Computer System Interface (SCSI) protocol, the Mode Page 83H comprising a manufacturer designation and a model number.

7. A method in accordance with claim 5, wherein receiving the identification information comprises:

receiving a mode page transmitted from the target device in accordance with the Small Computer System Interface (SCSI) protocol, the mode page selected from the group consisting of Mode Page OOH, Mode Page 80H, Mode Page 81H, Mode Page 82H, and Mode Page 83H.

8. A method in accordance with claim 1, wherein the identification information comprises a device model number.

9. A method in accordance with claim 8, wherein the identification information comprises a device manufacturer designation.

10. A method in accordance with claim 1, further comprising:

loading the target device handler into an information exchange convention (IEC) device manager.

11. A method in accordance with claim 1, wherein the identification information comprises a device manufacturer and a device model number.

12. A method in accordance with claim 1, further comprising:

communicating with a device caller using the standard information exchange convention, wherein the communicating with the device caller comprises exchanging the target device information with the device caller in accordance with the standard information exchange convention.

13. A method in accordance with claim 1, wherein the device caller is a network manager.

14. The method in accordance with claim 1, wherein the nonstandard information exchange convention is defined by a modified version of the published standard that defines the standard information exchange convention.

15. A method of communicating with a target device, the method comprising:

transmitting, a query command in accordance with a standard information exchange convention defined by a published standard, the standard information exchange convention defining a format for information transmitted in accordance with a protocol;

receiving identification information from the target device in accordance with the standard information exchange convention, the identification information comprising a manufacturer designator and a model number;

generating a class identifier based on the identification information;

determining the availability of a target device handler corresponding to the class identifier;

based on a positive determination, loading the target device handler corresponding to the class identifier into an information exchange convention (IEC) device manager; and

using the target device handler to exchange target device information with the target device in accordance with a nonstandard information exchange convention that is not defined by a published standard;

based on a negative determination, loading a generic device handler to attempt to exchange the target device information with the target device using the standard information exchange convention.

16. A method in accordance with claim 15, wherein the target device information comprises a capacity of a mass storage device.

17. A method in accordance with claim 15, wherein the target device information comprises a logical unit number (LUN) of a mass storage device.

18. A method in accordance with claim 17, wherein the LUN is based on storage system characterization.

19. A method in accordance with claim 17, wherein the LUN is based on a host computer characterization.

20. A method in accordance with claim 15, wherein the published standard is a Small Computer System Interface (SCSI) published standard.

21. A method in accordance with claim 20, wherein the query command is a request for Mode Page 83H.

22. A method in accordance with claim 20, wherein the query command is a request for a mode page selected from the group consisting of Mode Page OOH, Mode Page 80H, Mode Page 81H, Mode Page 82H, and Mode Page 83H.

23. The method in accordance with claim 15, wherein the nonstandard information exchange convention is defined by a modified version of the published standard that defines the standard information exchange convention.

24. An information exchange convention (IEC) device manager comprising:

computer-executable logic stored on a non-transitory computer readable medium, the computer-executable logic configured to cause the following steps to occur;

receiving identification information of a target device in accordance with a standard information exchange convention defined by a published standard;

generating a class identifier based on the identification information;

using the class identifier to identify a nonstandard information exchange convention that is not defined by a published standard;

using the nonstandard information exchange convention or the class identifier to identify a target device handler;

determining the availability of the identified target device handler;

based on a positive determination, using the identified target device handler associated with the target device to communicate with the target device;

wherein communicating with the target device comprises exchanging target device information in accordance with the nonstandard information exchange convention;

based on a negative determination, loading a generic device handler and attempting communicating with the target device using the standard information exchange convention.

25. A (IEC) device manager in accordance with claim 24, wherein the communicating with the target device comprises receiving device information complying with the nonstandard information exchange convention.

26. A (IEC) device manager in accordance with claim 25, wherein the target device is a memory device and the device information comprises a capacity of the memory device.

27. A (IEC) device manager in accordance with claim 24, wherein the standard information exchange convention is in accordance with Small Computer System Interface (SCSI) protocol.

28. A (IEC) device manager in accordance with claim 24, wherein the identification information comprises a device model number.

29. A (IEC) device manager in accordance with claim 28, wherein the identification information comprises a device manufacturer designation.

30. An IEC device manager in accordance with claim 24, wherein the nonstandard information exchange convention is defined by a modified version of the published standard that defines the standard information exchange convention.

31. An information exchange convention (IEC) device manager comprising:

computer-executable logic stored on a non-transitory computer readable medium, the computer-executable logic configured to cause the following steps to occur;

configuring a generic device handler to receive identification information of a target device in accordance with a standard information exchange convention defined by a published standard;

configuring a class identifier generator to generate a class identifier based on the identification information;

using the class identifier to identify a nonstandard information exchange convention that is not defined by a published standard;

determining the availability of a target device handler corresponding to the class identifier; and

based on a positive determination, configuring the target device handler corresponding to the class identifier to communicate with the target device using the nonstandard information exchange convention that is not defined by the published standard;

based on a negative determination, loading the generic device handler and attempting communicating with the target device using the standard information exchange convention.

32. An IEC device manager in accordance with claim 31, wherein the nonstandard information exchange convention is defined by a modified version of the published standard that defines the standard information exchange convention.

33. An information exchange convention (IEC) device manager comprising:

computer executable logic stored on a non-transitory computer readable medium, the computer executable logic comprising;

a receiving means for receiving identification information of a target device in accordance with a standard information exchange convention defined by a published standard;

a generating means for generating a class identifier based on the identification information;

an identifying means for identifying a nonstandard information exchange convention that is not defined by a published standard based on the class identifier;

a determining means for determining the availability of a target device handler corresponding to the class identifier and for determining if the EIC device manager can communicate with the target device using the target device handler corresponding to the class identifier in accordance with the non-standard information exchange convention that is not defined by a public standard; and

based on a positive determination, communicating with the target device using the target device handler corresponding to the class identifier in accordance with the nonstandard information exchange convention;

based on a negative determination, loading a generic handler to attempt to exchange information with the target device using the standard information exchange convention.

34. An IEC device manager in accordance with claim 33, wherein the target device is a memory device and the device information comprises a capacity of the memory device.

35. An IEC device manager in accordance with claim 33, wherein the target device is part of a memory device and the device information comprises a logical unit number (LUN) of the target device.

36. An IEC device manager in accordance with claim 33, wherein the standard information exchange convention is in accordance with Small Computer System Interface (SCSI) protocol.

37. An IEC device manager in accordance with claim 36, the receiving means for receiving Mode Page 83H transmitted from the target device in accordance with the Small Computer System Interface (SCSI) protocol, the Mode Page 83H comprising a manufacturer designation and a model number.

38. An IEC device manager in accordance with claim 36, the receiving means for receiving a mode page transmitted from the target device in accordance with the Small Computer System Interface (SCSI) protocol, the mode page selected from the group consisting of Mode Page OOH, Mode Page 80H, Mode Page 81H, Mode Page 82H, and Mode Page 83H.

39. An IEC device manager in accordance with claim 33, wherein the identification information comprises a device model number.

40. An IEC device manager in accordance with claim 39, wherein the identification information comprises a device manufacturer designation.

41. An IEC device manager in accordance with claim 33, further comprising:

a device caller communication means for communicating with a device caller using the standard information exchange convention.

42. An IEC device manager in accordance with claim 41, wherein the device caller communication means comprises a device caller exchanging means for exchanging the target device information with the device caller in accordance with the standard information exchange convention.

43. An IEC device manager in accordance with claim 33, wherein the device caller is a network manager.

44. An IEC device manager in accordance with claim 33, wherein the nonstandard information exchange convention is defined by a modified version of the published standard that defines the standard information exchange convention.

45. A program product for communicating with a target device, the program product comprising:

computer-executable logic contained on a non-transitory computer-readable medium and configured for causing the following computer-executed steps to occur;

receiving identification information of a target device in accordance with a standard information exchange convention defined by a published standard;

generating a class identifier based on the identification information;

using the class identifier to identify a nonstandard information exchange convention that is not defined by a published standard;

using the nonstandard information exchange convention or the class identifier to identify a target device handler;

determining the availability of the identified target device handler;

based on a positive determination, using the identified target device handler associated with the target device to communicate with the target device;

wherein communicating with the target device comprises exchanging target device information in accordance with the nonstandard information exchange convention;

based on a negative determination, loading a generic device handler and attempting to exchange information with the target device using the standard information exchange convention defined by a published standard.

46. A program product in accordance with claim 45, wherein the target device is a memory device and the device information comprises a capacity of the memory device.

47. A program product in accordance with claim 45, wherein the standard information exchange convention is in accordance with Small Computer System Interface (SCSI) protocol.

48. A program product in accordance with claim 47, wherein receiving the identification information comprises:

receiving Mode Page 83H transmitted from the target device in accordance with a Small Computer System Interface (SCSI) protocol, the Mode Page 83H comprising a manufacturer designation and a model number.

49. A program product in accordance with claim 47, wherein the identification information comprises a device model number.

50. A program product in accordance with claim 49, wherein the identification information comprises a device manufacturer designation.

51. A program product in accordance with claim 45, wherein the nonstandard information exchange convention is defined by a modified version of the published standard that defines the standard information exchange convention.