ECC FUNCTIONAL BLOCK PLACEMENT IN A MULTI-CHANNEL MASS STORAGE DEVICE

• US 20090044078A1
• Filed: 08/08/2007
• Published: 02/12/2009
• Est. Priority Date: 08/08/2007
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Vogan, Andrew, Jayachandran, Sowmiya, Khan, Jawad B.
• Granted Patent: US 8,001,444 B2
• Time in Patent Office: Days
• US Class Current: 714/773
• CPC Class Codes: G06F 11/108 Parity data distribution in semiconductor storages, e.g. in SSD
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 20/18 Error detection or correction; Testing , e.g. of drop-outs
• CPC Class Codes: G11B 2020/1062 Data buffering arrangements, e.g. recording or playback buffers

Abstract

A multiple channel storage device may include a host controller to receive input data from a host device and a buffer memory to store the input data and associated error correcting data prior to downstream storage. Multiple storage channels downstream from the buffer memory may store the input data and associated error correcting data in at least one of the storage channels on a non-volatile storage media. An error correcting engine between the host controller and the buffer memory may perform error correction encoding on the input data from the host device to generate the associated error correcting data for storage in the buffer memory. Such error correcting engine may protect against data errors in the buffer memory and in the storage channels.

Claims

1. A multiple channel storage device, comprising:

a host controller to receive input data from a host device;

a buffer memory to store the input data and associated error correcting data prior to downstream storage;

multiple storage channels downstream from the buffer memory to store the input data and associated error correcting data in at least one of the storage channels on a non-volatile storage media; and

an error correcting engine between the host controller and the buffer memory to perform error correction encoding on the input data from the host device to generate the associated error correcting data for storage in the buffer memory.

2. The storage device of claim 1, wherein the error correcting engine is arranged to perform Reed-Solomon encoding or Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoding on the input data.

3. The storage device of claim 1, wherein the error correcting engine is further arranged to perform error correction decoding on output data and associated error correcting data from the buffer memory.

4. The storage device of claim 1, further comprising:

a memory arbiter between the buffer memory and the multiple storage channels to arbitrate access to the buffer memory among the multiple storage channels.

5. The storage device of claim 1, wherein each of the multiple storage channels includes:

a solid-state memory device to store the input data and the associated error correcting data; and

a channel controller to control access to and from the solid-state memory device.

6. The storage device of claim 1, wherein each of the multiple storage channels includes:

a magnetic memory device to store the input data and the associated error correcting data; and

a channel controller to control access to and from the magnetic memory device.

7. A multiple channel storage device, comprising:

a first memory device;

a first channel controller connected to the first memory device;

a second memory device;

a second channel controller connected to the second memory device;

an arbiter connected to the first channel controller and to the second channel controller;

a buffer memory connected to the arbiter;

an error correcting engine directly connected to and upstream of the buffer memory to protect against data errors in the buffer memory, in the first memory device, and in the second memory device; and

a host controller directly connected to and upstream of the error correcting engine to provide uncorrected input data to the error correcting engine and to receive error corrected output data from the error correcting engine.

8. The storage device of claim 7, wherein the error correcting engine is arranged to perform Reed-Solomon encoding or Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoding and decoding.

9. The storage device of claim 7, wherein the first memory device includes a solid-state memory device, and

wherein the second memory device includes a solid-state memory device.

10. The storage device of claim 7, wherein the first memory device includes a solid-state memory device, and

wherein the second memory device includes a magnetic memory device.

11. A method of storing data in a multiple channel storage device, comprising:

receiving input data by a host controller from a host;

performing error correction encoding on the input data to generate error correction check information;

storing the input data and the error correction check information in a buffer memory;

updating a mapping table with locations for the input data and the error correction check information; and

writing the input data and the error correction check information to one or more memory devices in accordance with the locations from the mapping table.

12. The method of claim 11, wherein the performing includes:

performing Reed-Solomon encoding or Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoding.

13. The method of claim 11, wherein the writing includes:

writing the input data and the error correction check information across two or more memory devices in accordance with the locations from the mapping table.

14. The method of claim 11, further comprising:

reading output data and associated error correction check information from one or more memory devices in accordance with the locations from the mapping table; and

storing the output data and associated error correction check information in the buffer memory.

15. The method of claim 14, further comprising:

performing error correction decoding on the output data using the associated error correction check information to generate corrected output data; and

sending the corrected output data by the host controller to the host.