SIMULATION OF A PLURALITY OF STORAGE DEVICES FROM A SINGLE STORAGE DEVICE COUPLED TO A COMPUTATIONAL DEVICE

• US 20180275871A1
• Filed: 03/22/2017
• Published: 09/27/2018
• Est. Priority Date: 03/22/2017
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: PTAK, Slawomir
• Application Number:
  US15/466,648
• Publication Number:
  US 20180275871A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/0688 Non-volatile semiconductor memory arrays

Abstract

A computational device generates a plurality of logical storage devices from a single physical storage device coupled to the computational device. A plurality of physical storage devices are simulated via the plurality of logical storage devices. The plurality of physical storage devices and the single physical storage device are of a same type.

Claims

1. A method, comprising:

generating, in a computational device, a plurality of logical storage devices from a single physical storage device coupled to the computational device; and

simulating a plurality of physical storage devices via the plurality of logical storage devices, wherein the plurality of physical storage devices and the single physical storage device are of a same type.

2. The method of claim 1, the method further comprising:

partitioning the single physical storage device into a plurality of logical block address ranges; and

mapping each logical block address range to a logical storage device of the plurality of logical storage devices.

3. The method of claim 1, wherein the computational device communicates with the single physical storage device via a Non-Volatile Memory Express (NVMe) protocol, the method further comprising:

generating a plurality of namespaces from the single physical storage device; and

mapping each namespace of the plurality of namespaces to a logical storage device of the plurality of logical storage devices.

4. The method of claim 1, wherein an emulation layer in the computational device performs the generating of the plurality of logical storage devices and the simulating of the plurality of physical storage devices.

5. The method of claim 4, wherein the emulation layer performs interfacing between an upper level storage driver and a storage controller driver of the single physical storage device, and wherein the method further comprises:

testing functions of the upper level storage driver and functions of the plurality of physical storage devices by the simulating of the plurality of physical storage devices.

6. The method of claim 5, wherein:

the upper level storage driver configures the plurality of physical storage devices as a Redundant Array of Independent Disks (RAID).

7. The method of claim 6, wherein testing of the functions of the upper level storage driver and testing of the functions of the plurality of physical storage devices are performed without coupling any additional physical storage device in addition to the single physical storage device that is coupled to the computational device.

8. The method of claim 1, wherein the single physical storage device is adequate to simulate the plurality of physical storage devices, and wherein a command directed to any of the plurality of physical storage devices is directed to the single physical storage device.

9. A system coupled to a single physical storage device, the system comprising:

a memory; and

a processor coupled to the memory, wherein the processor is operable to;

generate a plurality of logical storage devices from the single physical storage device; and

simulate a plurality of physical storage devices via the plurality of logical storage devices, wherein the plurality of physical storage devices and the single physical storage device are of a same type.

10. The system of claim 9, wherein the processor is further operable to:

partition the single physical storage device into a plurality of logical block address ranges; and

map each logical block address range to a logical storage device of the plurality of logical storage devices.

11. The system of claim 9, wherein the system communicates with the single physical storage device via a Non-Volatile Memory Express (NVMe) protocol, wherein the processor is further operable to:

generate a plurality of namespaces from the single physical storage device; and

map each namespace of the plurality of namespaces to a logical storage device of the plurality of logical storage devices.

12. The system of claim 9, wherein an emulation layer performs generating of the plurality of logical storage devices and simulating of the plurality of physical storage devices.

13. The system of claim 12, wherein the emulation layer performs interfacing between an upper level storage driver and a storage controller driver of the single physical storage device, and wherein the processor is further operable to:

test functions of the upper level storage driver and functions of the plurality of physical storage devices via simulation of the plurality of physical storage devices.

14. The system of claim 13, wherein:

the upper level storage driver configures the plurality of physical storage devices as a Redundant Array of Independent Disks (RAID).

15. The system of claim 14, wherein testing of the functions of the upper level storage driver and testing of the functions of the plurality of physical storage devices are performed without coupling any additional physical storage device in addition to the single physical storage device.

16. The system of claim 9, wherein the single physical storage device is adequate to simulate the plurality of physical storage devices, and wherein a command directed to any of the plurality of physical storage devices is directed to the single physical storage device.

17. A computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured to perform operations on a computational device, the operations comprising:

generating a plurality of logical storage devices from a single physical storage device coupled to the computational device; and

simulating a plurality of physical storage devices via the plurality of logical storage devices, wherein the plurality of physical storage devices and the single physical storage device are of a same type.

18. The computer readable storage medium of claim 17, the operations further comprising:

partitioning the single physical storage device into a plurality of logical block address ranges; and

mapping each logical block address range to a logical storage device of the plurality of logical storage devices.

19. The computer readable storage medium of claim 17, wherein the computational device communicates with the single physical storage device via a Non-Volatile Memory Express (NVMe) protocol, the operations further comprising:

generating a plurality of namespaces from the single physical storage device; and

mapping each namespace of the plurality of namespaces to a logical storage device of the plurality of logical storage devices.

20. The computer readable storage medium of claim 17, wherein an emulation layer in the computational device performs the generating of the plurality of logical storage devices and the simulating of the plurality of physical storage devices.

21. The computer readable storage medium of claim 20, wherein the emulation layer performs interfacing between an upper level storage driver and a storage controller driver of the single physical storage device, and wherein the operations further comprises:

testing functions of the upper level storage driver and functions of the plurality of physical storage devices by the simulating of the plurality of physical storage devices.

22. The computer readable storage medium of claim 21, wherein:

the upper level storage driver configures the plurality of physical storage devices as a Redundant Array of Independent Disks (RAID).

23. The computer readable storage medium of claim 22, wherein testing of the functions of the upper level storage driver and testing of the functions of the plurality of physical storage devices are performed without coupling any additional physical storage device in addition to the single physical storage device that is coupled to the computational device.

24. The computer readable storage medium of claim 17, wherein the single physical storage device is adequate to simulate the plurality of physical storage devices, and wherein a command directed to any of the plurality of physical storage devices is directed to the single physical storage device.