Storage device capable of performing peer-to-peer communication and data storage system including the same

Patent metadata

Field	Value
Publication number	US-10725871-B2
Application number	US-201715698902-A
Country	US
Kind code	B2
Filing date	Sep 8, 2017
Priority date	Oct 7, 2016
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A first storage device capable of performing peer-to-peer communications with a second storage device includes a first submission queue for storing a first operation code; a first completion queue for storing a first indication signal; and a first controller configured to, read the first operation code stored in the first submission queue, create a command including a second operation code based on the first operation code, issue the command to the second storage device, and receive and processes a second completion signal transmitted from the second storage device.

First claim

What is claimed is:

1. A data storage system comprising:
a peripheral component interconnect express (PCIe) switch;
a plurality of source storage devices connected to the PCIe switch; and
a rebuild storage device connected to the PCIe switch,
wherein the source storage devices are configured to communicate, through peer-to-peer communications with each other via the PCIe switch, data for performing a data rebuild operation for the rebuild storage device,
wherein the plurality of source storage devices includes a first source storage device and second source storage devices,
wherein the first source storage device is configured to,
receive data from at least one of the second source storage devices via the PCIe switch,
read first data from a memory of the first source storage device, and
perform the data rebuild operation based on the first data and the data received from the at least one of the second source storage devices.

2. The data storage system of claim 1 , wherein the plurality of source storage devices and the rebuild storage device are NVM Express (NVMe) storage devices.

3. The data storage system of claim 1 , further comprising:
a controller configured to transmit, to each of the plurality of source storage devices through the PCIe switch, different pieces of rebuild allocation information allocated to each of the plurality of source storage devices and the number of the plurality of source storage devices.

4. The data storage system of claim 3 ,
wherein the first source storage device is configured to transmit a read command to each of the second source storage devices through the PCIe switch for the data rebuild operation based on rebuild allocation information stored on the first source storage device and the number of the source storage devices.

5. The data storage system of claim 4 ,
wherein the at least one second source storage device is the second storage devices, and
wherein each of the second source storage devices is configured to,
read respective second data from a memory of each of the second source storage devices based on rebuild allocation information stored on each of the second source storage devices, the number of the plurality of source storage devices, and the read command, and
transmit the respective second data to the first source storage device through the PCIe switch.

6. The data storage system of claim 5 , wherein the first source storage device is configured to,
read the first data from the memory of the first source storage device based on the rebuild allocation information stored on the first source storage device and the number of the plurality of source storage devices,
perform the data rebuild operation based on the first data and the respective second data transmitted from each of the second source storage devices, the data rebuild operation including generating rebuild data, and
transmit the rebuild data to the rebuild storage device through the PCIe switch.

7. The data storage system of claim 6 , wherein the plurality of source storage devices are configured to perform, without an intervention of the controller,
the reading of the respective second data,
the reading of the first data, and
generation of the rebuild data.

8. The data storage system of claim 6 , wherein the plurality of source storage devices are configured such that the reading of the respective second data and the reading of the first data are performed in a parallel manner.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Jun Bum
• Shim Ho Jun

Classifications

• G06F2213/0026

  PCI express · CPC title

• G06F2212/262

  configured as RAID · CPC title

• G06F11/1662 Primary

  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 title

• G06F9/546

  Message passing systems or structures, e.g. queues · CPC title

• G06F9/3836

  Instruction issuing, e.g. dynamic instruction scheduling or out of order instruction execution · CPC title