Remotely accessible solid state drive

• US 10,079,889 B1
• Filed: 02/27/2018
• Issued: 09/18/2018
• Est. Priority Date: 11/04/2014
• Status: Active Grant

• Current Assignee: Pavilion Data Systems, Inc.
• Original Assignee: Pavilion Data Systems, Inc.
• Inventors: Malwankar, Kiron Balkrishna, Govindasamy, Raghuraman, Melnic, Dan M.
• Primary Examiner(s): Pollack, Melvin H
• Application Number:
  US15/907,172
• Time in Patent Office: 203 Days
• Field of Search: 709217
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0614 Improving the reliability of storage systems
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• 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 3/0688 Non-volatile semiconductor memory arrays
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching

Abstract

A solid state drive (SSD) comprises a storage area, a network interface controller (NIC) and a storage controller operatively coupled to the storage area. The storage controller comprises a mapping between the storage area and a virtual storage device that is accessible to a remote computing device. The storage controller is configured to receive a message encapsulating an input/output (I/O) command from a remote computing device via the NIC, wherein the I/O command is directed to the virtual storage device. The storage controller is further configured to determine one or more logical addresses of the virtual storage device specified in the I/O command, translate the one or more logical addresses of the virtual storage device into one or more physical addresses of the storage area, and access the one or more physical addresses of the storage area.

Claims

1. A solid state drive (SSD), comprising:

a storage area;

a network interface controller (NIC); and

a storage controller operatively coupled to the storage area, the storage controller comprising a mapping between the storage area and a virtual storage device that is accessible to a remote computing device, wherein the storage controller is to;

receive a message encapsulating an input/output (I/O) command from a remote computing device via the NIC, wherein the I/O command is directed to the virtual storage device;

determine one or more logical addresses of the virtual storage device specified in the I/O command;

translate the one or more logical addresses of the virtual storage device into one or more physical addresses of the storage area using the mapping; and

access the one or more physical addresses of the storage area.

2. The SSD of claim 1, wherein the storage controller further comprises a processing device and a memory.

3. The SSD of claim 2, wherein the storage controller comprises a system on a chip (SoC), and wherein the NIC is a component of the storage controller.

4. The SSD of claim 1, wherein the mapping between the virtual storage device and the storage area of the SSD is a one-to-one mapping.

5. The SSD of claim 1, wherein the NIC is an Ethernet-compatible NIC, wherein the message comprises an Ethernet packet encapsulating the I/O command, and wherein the I/O command is included in a payload portion of the Ethernet packet.

6. The SSD of claim 5, wherein the I/O command comprises a write command, and wherein the storage controller is further to:

receive one or more additional Ethernet packets encapsulating data to be stored for the write command;

remove the data from the one or more additional Ethernet packets; and

store the data in the storage area at the one or more physical addresses.

7. The SSD of claim 5, wherein the I/O command comprises a read command, and wherein the storage controller is further to:

read data from the one or more physical addresses of the storage area;

generate one or more Ethernet packets encapsulating the data; and

send the one or more Ethernet packets encapsulating the data to the remote computing device to satisfy the I/O command.

8. The SSD of claim 5, wherein the I/O command encapsulated in the Ethernet packet is a nonvolatile memory express (NVMe) command.

9. The SSD of claim 1, wherein the storage controller is further to:

validate the I/O command based on determining whether the remote computing device has access to the one or more logical addresses; and

access the one or more physical addresses of the storage area responsive to validating the I/O command.

10. The SSD of claim 1, wherein the storage controller is further to:

receive an additional message from the remote computing device, the additional message encapsulating a task management command;

determine one or more previously received I/O commands identified in the task management command; and

cancel the one or more previously received I/O commands.

11. A method comprising:

receiving, by a storage controller of a solid state drive (SSD), a message encapsulating an input/output (I/O) command from a remote computing device, wherein the I/O command is directed to a virtual storage device;

determining, by the storage controller, one or more logical addresses of the virtual storage device specified in the I/O command;

translating, by the storage controller, the one or more logical addresses of the virtual storage device into one or more physical addresses of a storage area of the SSD using a mapping between the virtual storage device and the storage area; and

accessing the one or more physical addresses of the storage area.

12. The method of claim 11, further comprising:

generating the mapping between the virtual storage device and the storage area of the SSD.

13. The method of claim 12, wherein the mapping is a one-to-one mapping.

14. The method of claim 11, wherein the message comprises an Ethernet packet encapsulating the I/O command, and wherein the I/O command is included in a payload portion of the Ethernet packet.

15. The method of claim 14, wherein the I/O command comprises a write command, the method further comprising:

receiving one or more additional Ethernet packets encapsulating data to be stored for the write command;

removing the data from the one or more additional Ethernet packets; and

storing the data in the storage area at the one or more physical addresses.

16. The method of claim 14, wherein the I/O command comprises a read command, the method further comprising:

reading data from the one or more physical addresses of the storage area;

generating one or more Ethernet packets encapsulating the data; and

sending the one or more Ethernet packets encapsulating the data to the remote computing device to satisfy the I/O command.

17. The method of claim 14, wherein the I/O command encapsulated in the Ethernet packet is a nonvolatile memory express (NVMe) command.

18. The method of claim 17, further comprising:

removing the I/O command from the message; and

executing the I/O command.

19. The method of claim 11, further comprising:

determining that the remote computing device has access to the one or more logical addresses;

validating the I/O command; and

accessing the one or more physical addresses of the storage area responsive to validating the I/O command.

20. The method of claim 11, further comprising:

receiving an additional message from the remote computing device, the additional message encapsulating a task management command;

determining one or more previously received I/O commands identified in the task management command; and

canceling the one or more previously received I/O commands.