SCALEABLE AND MAINTAINABLE SOLID STATE DRIVE

• US 20090063895A1
• Filed: 09/04/2007
• Published: 03/05/2009
• Est. Priority Date: 09/04/2007
• Status: Abandoned Application

• Current Assignee: Micron Technology, Inc.
• Original Assignee: Micron Technology, Inc.
• Inventors: Smith, Kurt
• Application Number:
  US11/849,644
• Publication Number:
  US 20090063895A1
• Time in Patent Office: Days
• US Class Current: 714/7
• CPC Class Codes: G06F 11/1662 the resynchronized component or unit being a persistent storage device re-synchronization of failed mirror storage G06F11/2082; rebuild or reconstruction of parity RAID storage G06F11/1008
• CPC Class Codes: G06F 11/2056 by mirroring
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0631 by allocating resources to storage systems
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• CPC Class Codes: G06F 3/0688 Non-volatile semiconductor memory arrays

Abstract

Methods and apparatus for maintaining a solid state disk drive facilitate expansion of storage capacity and maintenance of internal memory storage media, for example, are disclosed. Memory modules are adapted for removable installation in a solid state drive allowing for expansion of drive storage capacity and servicing of failed or worn out memory storage media. Data can be managed to mitigate loss during expansion, maintenance and servicing of the solid state drive.

Claims

1. A scaleable drive device, comprising:

a master controller for managing operation of the drive device; and

a plurality of coupling locations for removably coupling memory modules to the master controller.

3. The drive device of claim 1 further comprising an interface to receive and transmit signals relating to the operation of the drive device.

4. The drive device of claim 3 wherein the master controller is configured to manage the operation of the drive device in response to the received signals.

5. The drive device of claim 1 further comprising one or more memory modules removably coupled to the coupling locations, wherein the memory modules each comprise a memory module electrical interface adapted to mate with a coupling location.

7. The drive device of claim 5 wherein at least one of the one or more memory modules comprises one or more memory storage devices and wherein the one or more memory storage devices are non-volatile memory storage devices.

8. The drive device of claim 7 wherein the one or more memory storage devices are flash memory storage devices.

10. The drive device of claim 5 wherein at least one of the coupling locations and the memory module electrical interface comprises a mechanical electrical connector adapted to allow coupling of the coupling locations and the memory module electrical interface.

14. The drive device of claim 10 wherein the mechanical electrical connectors are of either male or female configuration and selected from a list of electrical connectors consisting of DIP, SIPP, SIMM, DIMM and SO-DIMM type connectors.

16. The drive device of claim 1 wherein the interface is a connector selected from a list of connectors consisting of IDE, ATA, SATA, PATA, SCSI, D-type, IDC and PCMCIA type connectors.

21. The drive device of claim 1 wherein the master controller is configured to transfer data stored in a first memory module coupled to a first coupling location to a second memory module coupled to a second coupling location.

22. The drive device of claim 1 wherein the drive device is configured to allow hot swapping of memory modules coupled to the coupling locations.

2. (canceled)

6. (canceled)

9. (canceled)

11-13. -13. (canceled)

15. (canceled)

17-20. -20. (canceled)

23. A scaleable drive device, comprising:

a master controller for interpreting received signals and managing operation of the drive in response to the interpreted received signals;

one or more memory modules, the memory modules comprising;

a module interface;

control circuitry; and

one or more non-volatile memory devices; and

a plurality of coupling locations for removably coupling memory modules to the master controller.

24. The drive device of claim 23 wherein the master controller is configured to perform a data transfer operation between two or more memory modules coupled to the coupling locations.

25. The drive device of claim 24 wherein the master controller automatically performs the data transfer operation in response to a condition being met wherein the condition is selected from the group of conditions comprised of the occurrence of a hard failure in one or more of the memory modules and an indication that a memory module contains worn out memory.

26. The drive device of claim 24 wherein the data transfer operation is performed in response to a manually provided command.

27. A scaleable drive device, comprising:

a plurality of memory modules, the memory modules comprising a module interface, control circuitry and one or more memory storage devices;

a first subset of the plurality of memory modules;

a second subset of the plurality of memory modules;

a first master controller for managing the operation of the first subset of the plurality of memory modules in response to received signals;

a second master controller for managing the operation of the second subset of the plurality of memory modules in response to the received signals;

a first plurality of coupling locations for removably coupling the first subset of the plurality of memory modules to the first master controller; and

a second plurality of coupling locations for removably coupling the second subset of the plurality of memory modules to the second master controller.

28. The drive device of claim 27 wherein the drive device is configured to operate in a plurality of modes, the plurality of modes comprising a RAID 0 level mode and a RAID 1 level mode.

29. A method of modifying a drive, comprising:

removing a memory module from a mechanical coupling location of the drive; and

inserting a memory module into a mechanical coupling location of the drive;

wherein each of the mechanical coupling locations is adapted to mate with an electrical interface of the memory modules.

30. The method of claim 29 further comprising removing a memory module and replacing it with a memory module having the same memory storage capacity.

31. The method of claim 29 further comprising replacing a memory module in response to a failure detected in the memory module being replaced.

32. The method of claim 29 further comprising removing a memory module and replacing it with a memory module having a greater memory storage capacity than the removed memory module.

33. The method of claim 29 further comprising transferring data stored in a first memory module of the drive device to a second memory module of the drive device.

34. The method of claim 33 wherein transferring the data is performed prior to removing the first memory module.

35. The method of claim 29 further comprising replacing a memory module in response to exceeding a wear level threshold.

36. The method of claim 29 further comprising removing a memory module and replacing it with a memory module having a lower memory storage capacity than the removed memory module.

37. The method of claim 29 wherein the drive device is further adapted to facilitate removing and/or installing a memory module without interrupting power to the drive device.

38. An electronic system, the system comprising:

An external controller for generating data storage signals;

at least one scaleable drive, in communication with the external controller, the drive comprising;

a master controller for managing the operation of the drive in response to received signals; and

a plurality of independently removable memory modules coupled to the master controller.

39. The system of claim 38 wherein the drive is coupled to the external controller and utilizes one of a bus interface protocol taken from a list of protocols consisting of IDE, ATA, SATA, PATA, Fibre Channel, SCSI and PCMCIA type interface protocols.

40. The system of claim 38 wherein the independently removable memory modules are solid state memory modules.

41. A scaleable drive device, comprising:

a master controller for managing operation of the drive device; and

a plurality of coupling locations for removably coupling memory modules to the master controller; and

one or more memory modules, wherein each of the memory modules is removably coupled to one of the coupling locations;

wherein the master controller is adapted to monitor coupled memory modules for indications that the memory modules should be replaced, and to automatically perform a data transfer from a memory module indicating that it should be replaced to another memory module of the drive device.

42. The drive device of claim 41 wherein each memory module comprises one or more non-volatile memory storage devices.

43. The drive device of claim 41 wherein each of the memory modules comprises a mechanical electrical connector adapted to mate with the coupling locations.

44. The drive device of claim 43 wherein the memory modules and the coupling locations each comprise a mechanical electrical coupling having either a male or a female configuration and selected from a list of electrical connectors consisting of DIP, SIPP, SIMM, DIMM and SO-DIMM type connectors.

45. The drive device of claim 41 wherein the drive device further comprises an interface selected from the group consisting of IDE, ATA, SATA, PATA, SCSI, D-type, IDC and PCMCIA type connectors.

46. A method of modifying a solid state drive, comprising:

detecting a failure of a memory module of the drive;

removing the failed memory module from a mechanical coupling location of the drive; and

inserting a replacement memory module into a mechanical coupling location of the drive;

wherein each of the mechanical coupling locations is adapted to mate with an electrical interface of the memory modules.

47. The method of claim 46 further comprising wherein the failed memory module and the replacement memory module have the same memory storage capacity.

48. The method of claim 46 further comprising transferring data stored in the failed memory module of the drive to a different memory module of the drive prior to removing the failed memory module.

49. The method of claim 46 wherein the drive is further adapted to facilitate removing and/or installing a memory module without interrupting power to the drive.

50. The method of claim 46 wherein removing the failed memory module from a mechanical coupling location and inserting the replacement memory module into a mechanical coupling location occur using the same mechanical coupling location.

51. A method of modifying a solid state drive, comprising:

detecting that a memory module of the drive has indicated that it has neared the end of its useful life;

removing the memory module indicating that it has neared the end of its useful life from a mechanical coupling location of the drive; and

inserting a replacement memory module into a mechanical coupling location of the drive;

wherein each of the mechanical coupling locations is adapted to mate with an electrical interface of the memory modules.

52. The method of claim 51 further comprising wherein the memory module indicating that it has neared the end of its useful life and the replacement memory module have different memory storage capacities.

53. The method of claim 51 further comprising transferring data stored in the memory module indicating that it has neared the end of its useful life to a different memory module of the drive prior to inserting the replacement memory module.

54. The method of claim 51 wherein inserting the replacement module occurs in a different mechanical coupling location than the mechanical coupling location from which the memory module indicating that it has neared the end of its useful life is removed.

55. A method of modifying a solid state drive, comprising:

detecting a failure of a memory module of the drive;

removing the failed memory module from a mechanical coupling location of the drive while the drive is powered up; and

inserting a replacement memory module into a mechanical coupling location of the drive while the drive is powered up;

wherein each of the mechanical coupling locations is adapted to mate with an electrical interface of the memory modules; and

wherein the replacement memory module has a memory storage capacity that is equal to or greater than a memory storage capacity of the failed memory module.

56. The method of claim 55 further comprising inserting the replacement memory module, and transferring data stored in the failed memory module to the replacement memory module, prior to removing the failed memory module.

57. A method of modifying a solid state drive, comprising:

detecting that a memory module of the drive has indicated that it has neared the end of its useful life;

removing the memory module indicating that it has neared the end of its useful life from a mechanical coupling location of the drive while the drive is powered up; and

inserting a replacement memory module into a mechanical coupling location of the drive while the drive is powered up;

wherein each of the mechanical coupling locations is adapted to mate with an electrical interface of the memory modules; and

wherein the replacement memory module has a memory storage capacity that is equal to or greater than a memory storage capacity of the memory module indicating that it has neared the end of its useful life.

58. The method of claim 57 further comprising inserting the replacement memory module, and transferring data stored in the memory module indicating that it has neared the end of its useful life to the replacement memory module, prior to removing the memory module indicating that it has neared the end of its useful life.

59. A method of operating a solid state drive, comprising:

performing maintenance and servicing tasks for non-volatile memory devices of one or more memory modules of the drive to determine whether failure or excessive wear has occurred;

providing an indication if a failure or excessive wear is detected for any of the memory modules;

monitoring the one or more memory modules for the indications of failure or excessive wear; and

transferring data from a memory module indicating failure or excessive wear of its non-volatile memory devices to another memory module of the drive.

60. The method of claim 59 further comprising providing an indication external to the drive if a memory module has indicated failure or excessive wear of its non-volatile memory devices.

61. The method of claim 60 wherein providing an indication external to the drive comprises providing an indication using an LED or other status indicator located on the drive or providing an indication by transmitting a signal to an external processor.

62. The method of claim 60 further comprising removing the memory module indicating failure or excessive wear in response to the indication external to the drive and after transferring its data to another memory module.

63. The method of claim 62 further comprising replacing the removed memory module with a replacement memory module.

64. The method of claim 63 wherein replacing the removed memory module with a replacement memory module comprises replacing the removed memory module with a replacement memory module of the same memory capacity.

65. The method of claim 59 further comprising:

receiving a signal from an external device indicative of a desire to transfer data from a first memory module to a second memory module; and

transferring data from the first memory module to the second memory module in response to the signal.

66. A method of operating a solid state drive, comprising:

performing maintenance and servicing tasks for non-volatile memory devices of one or more memory modules of the drive to determine whether failure or excessive wear has occurred;

providing an indication if a failure or excessive wear is detected for any of the memory modules;

monitoring the one or more memory modules for the indications of failure or excessive wear; and

transferring data from a memory module to another memory module of the drive in response to either an indication of failure or excessive wear of that memory module or in response to a signal received from an external device indicative of a desire to transfer data from that memory module.

67. The method of claim 66 further comprising transmitting a second signal to the external device if a memory module has indicated failure or excessive wear of its non-volatile memory devices, wherein the second signal indicates which memory module has indicated failure or excessive wear.

68. The method of claim 67 further comprising removing the memory module indicating failure or excessive wear in response to the second signal and after transferring its data to another memory module.

69. The method of claim 68 further comprising replacing the removed memory module with a replacement memory module.

70. The method of claim 67 further comprising removing the memory module indicated by the signal received from the external device after transferring its data to another memory module.

71. The method of claim 70 further comprising replacing the removed memory module with a replacement memory module having the same or higher memory capacity.