Data storage device and data processing system having the same

• US 10,503,406 B2
• Filed: 04/28/2016
• Issued: 12/10/2019
• Est. Priority Date: 06/22/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kang, Nam Wook
• Primary Examiner(s): Gu, Shawn X
• Application Number:
  US15/141,397
• Publication Number:
  US 20160371031A1
• Time in Patent Office: 1,321 Days
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0616 in relation to life time, e.g. increasing Mean Time Between Failures [MTBF]
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

A data storage device includes a plurality of scale-out storage devices, and a controller configured to determine a characteristic of data and configured to transmit and receive the data to or from a first scale-out storage device among the plurality of scale-out storage devices based on the determined characteristic. Each of the plurality of scale-out storage devices includes a volatile memory, a nonvolatile memory, and a scale-out controller configured to control the volatile memory and the nonvolatile memory.

Claims

1. A data storage device, comprising:

a plurality of scale-out storage devices, each of the plurality of scale-out storage devices including a volatile memory, a nonvolatile memory, and a scale-out controller configured to control the volatile memory and the nonvolatile memory; and

a controller configured to communicate with and control the plurality of scale-out storage devices through a main channel, respectively,

wherein the controller is further configured to determine a characteristic of write data and a type of each of the plurality of scale-out storage devices, and to transmit the write data to one of the plurality of scale-out storage devices based on the characteristic of the write data and the type of the each of the plurality of scale-out storage devices,

wherein the controller is further configured to assign logical addresses to the each of the plurality of scale-out storage devices based on the type of the each of the plurality of scale-out storage devices,

wherein the characteristic of the write data is determined by a logical address of the write data,

wherein the logical address of the write data transmitted to the one of the plurality of scale-out storage devices is assigned to the one of the plurality of scale-out storage devices, and

wherein the controller is further configured to transmit the write data to the one of the plurality of scale-out storage devices to which the logical address of the write data is assigned, from among the plurality of scale-out storage devices.

2. The data storage device of claim 1, wherein the controller comprises a user interface configured to receive a user input for determining the type of the each of the plurality of scale-out storage devices.

3. The data storage device of claim 2, wherein the controller further comprises:

a data classification module including a type formatter and a data classifier; and

a central processing unit (CPU) configured to execute the type formatter to determine the type of the each of the plurality of scale-out storage devices based on the user input, and execute the data classifier to determine the characteristic of the write data and to transmit the write data to the one of the plurality of scale-out storage devices based on the characteristic of the write data and the type of the each of the plurality of scale-out storage devices.

4. The data storage device of claim 1, wherein the type of the each of the plurality of scale-out storage devices is determined according to at least one of an operation clock frequency of the scale-out controller, a bandwidth of the volatile memory, a program method for the nonvolatile memory, a mapping size of a flash translation layer (FTL) that manages data stored in the nonvolatile memory, a ratio of a user data region and an over-provisioning region of the nonvolatile memory, and a capacity of the nonvolatile memory.

5. The data storage device of claim 1, wherein the scale-out controller of the one of the plurality of scale-out storage devices is configured to program the write data in the nonvolatile memory of the one of the plurality of scale-out storage devices using a table stored in the volatile memory of the one of the plurality of scale-out storage devices.

6. The data storage device of claim 5, wherein the table stored in the volatile memory of the one of the plurality of scale-out storage devices includes mapping information regarding a logical address of the write data and a physical address of the nonvolatile memory of the one of the plurality of scale-out storage devices.

7. The data storage device of claim 1, wherein the controller is further configured to receive a read command including a logical address of read data from an external host, and to transmit the logical address of the read data to at least one of the plurality of scale-out storage devices to which the logical address of the read data is assigned, from among the plurality of scale-out storage devices,

the scale-out controller of the one of the plurality of scale-out storage devices is further configured to read the read data from the nonvolatile memory of the one of the plurality of scale-out storage devices to which the logical address of the read data is assigned using a table stored in the volatile memory of the one of the plurality of scale-out storage devices to which the logical address of the read data is assigned, and the table stored in the volatile memory of the one of the plurality of scale-out storage devices to which the logical address of the read data is assigned includes mapping information regarding the logical address of the read data and a physical address of the nonvolatile memory of the one of the plurality of scale-out storage devices to which the logical address of the read data is assigned.

8. The data storage device of claim 7, wherein the controller comprises a host interface configured to receive the write data and the read command from an external host and to transmit the read data to the external host.

9. The data storage device of claim 1, further comprising:

an external volatile memory connected to the controller and configured to store a table including information about the logical addresses assigned to the each of the plurality of scale-out storage devices.

10. The data storage device of claim 1, wherein the characteristic of the write data comprises at least one of a characteristic of whether the write data is data for a sequential access or a random access, whether the write data is hot data or cold data, and whether the write data is large data or small data.

11. The data storage device of claim 1, wherein a volatile memory and a scale-out controller included in at least one of the plurality of scale-out storage devices are packaged in a multi-chip package.

12. A data storage device, comprising:

a plurality of scale-out storage devices, each of the plurality of scale-out storage devices including a volatile memory, a nonvolatile memory, and a scale-out controller configured to control the volatile memory and the nonvolatile memory; and

a controller configured to communicate with and control the plurality of scale-out storage devices through a main channel, respectively,

wherein the controller comprises;

a first interface configured to receive data from an external host;

a second interface connected to the plurality of scale-out storage devices via the main channel; and

a data classification circuit configured to determine a characteristic of the data and a type of each of the plurality of scale-out storage devices, and to transmit the data to one of the plurality of scale-out storage devices via the second interface based on the characteristic of the data and the type of the each of the plurality of scale-out storage devices,

wherein the data classification circuit is further configured to assign logical addresses to the each of the plurality of scale-out storage devices based on the type of the each of the plurality of scale-out storage devices,

wherein the characteristic of the data is determined by a logical address of the data, and

wherein the logical address of the data transmitted to the one of the plurality of scale-out storage devices is assigned to the one of the plurality of scale-out storage devices, and

wherein the data classification circuit is further configured to transmit the data to the one of the plurality of scale-out storage devices to which the logical address of the data is assigned, from among from the plurality of scale-out storage devices.

13. The data storage device of claim 12, wherein the controller further comprises a user interface configured to receive a user input for determining the type of the each of the plurality of scale-out storage devices.

14. The data storage device of claim 12, wherein the type of the each of the plurality of scale-out storage devices is determined according to at least one of an operation clock frequency of the scale-out controller, a bandwidth of the volatile memory, a program method for the nonvolatile memory, a mapping size of a flash translation layer (FTL) that manages data stored in the nonvolatile memory, and a ratio of a user data region and an over-provisioning region of the nonvolatile memory.

15. The data storage device of claim 12, wherein the characteristic of the data comprises at least one of a characteristic of whether the data is data for a sequential access or a random access, whether the data is write data or read data, whether the data is hot data or cold data, and whether the data is large data or small data.

16. The data storage device of claim 12, wherein the data classification circuit comprises:

a type formatter configured to determine the type of the each of the plurality of scale-out storage devices; and

a data classifier configured to determine the characteristic of the data and determine the one of the plurality of scale-out storage devices to which the data is transmitted, from among the plurality of scale-out storage devices.