CONTROLLER, FLASH MEMORY APPARATUS, AND METHOD FOR WRITING DATA INTO FLASH MEMORY APPARATUS

• US 20150378888A1
• Filed: 05/22/2015
• Published: 12/31/2015
• Est. Priority Date: 06/27/2014
• Status: Abandoned Application

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wei, Mingchang, Zhang, Chenyi, Lin, Chungong
• Application Number:
  US14/719,844
• Publication Number:
  US 20150378888A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 12/0868 Data transfer between cache memory and other subsystems, e.g. storage devices or host systems
• CPC Class Codes: G06F 2212/1032 Reliability improvement, data loss prevention, degraded operation etc
• CPC Class Codes: G06F 2212/214 Solid state disk
• CPC Class Codes: G06F 2212/7204 Capacity control, e.g. partitioning, end-of-life degradation
• CPC Class Codes: G06F 2212/7208 Multiple device management, e.g. distributing data over multiple flash devices
• CPC Class Codes: G06F 2212/7209 Validity control, e.g. using flags, time stamps or sequence numbers
• CPC Class Codes: G11C 29/883 using a single defective memory device with reduced capacity, e.g. half capacity

Abstract

A storage controller for determining an amount of data to be sent to a flash memory apparatus for storage comprises a communications interface for communicating with the flash memory apparatus and a processor. The flash memory apparatus comprises a block including a plurality of pages. And at least one of the pages is unavailable for storage. The processor is configured to receive information of the block sent by the flash memory apparatus, wherein the information includes capacity of one or more unavailable pages in the block. And then, the processor determines an available capacity of the block, based on the information and a total capacity of the block. Further, the processor obtains data to be sent to the flash memory apparatus, wherein an amount of the data is equal to the available capacity of the block. At last, the processor sends the data to the flash memory apparatus.

Claims

1. A storage controller for determining an amount of data to be sent to a flash memory apparatus for storage;

wherein the flash memory apparatus comprises a block, which includes a plurality of pages;

wherein at least one of the pages is unavailable for storage, the storage controller comprising;

a communications interface for communicating with the flash memory apparatus; and

a processor connected to the communications interface,

and configured to receive information of the block sent by the flash memory apparatus, wherein the information includes capacity of one or more unavailable pages in the block;

determine an available capacity of the block, based on the information and a total capacity of the block, wherein the available capacity of the block is a remaining capacity of the total capacity by removing the capacity of one or more unavailable pages;

obtain data to be sent to the flash memory apparatus, wherein an amount of the data is equal to the available capacity of the block; and

send the data to the flash memory apparatus for storage.

2. The storage controller according to claim 1, wherein the storage controller further includes a cache;

and

the processor is further configured to receive multiple write data requests, wherein each of the write data requests includes a partition of the data to be sent to the flash memory apparatus; and

the processor is configured to obtain the data to be sent to the flash memory apparatus from the cache.

3. The storage controller according to claim 1, wherein the processor is further configured to receive the total capacity of the block sent by the flash memory apparatus, before receiving the information of the block.

4. A flash memory apparatus, which includes a block for storing data and a communications interface for communicating with a storage controller;

wherein the block comprises a plurality of pages, and at least one of the pages is unavailable for storage;

wherein the flash memory apparatus further includes a primary controller connected to the block, and configured to;

collect information of the block, wherein the information includes capacity of one or more unavailable pages in the block;

send the information to the storage controller;

receive data sent by the storage controller; and

write the data into the block.

5. The flash memory apparatus according to claim 4, wherein the primary controller is further configured to receive a query command for inquiring the information of the block.

6. The flash memory apparatus according to claim 4, wherein the primary controller is configured to send the information to the storage controller periodically.

7. A method for a storage controller to determine an amount of data to be sent to a flash memory apparatus for storage;

wherein the flash memory apparatus comprises a block, which includes a plurality of pages;

wherein at least one of the pages is unavailable for storage;

the method performed by the storage controller comprising;

receiving information of the block sent by the flash memory apparatus, wherein the information includes capacity of one or more unavailable pages in the block;

determining an available capacity of the block, based on the information and a total capacity of the block, wherein the available capacity of the block is a remaining capacity of the total capacity by removing the capacity of one or more unavailable pages;

obtaining data to be sent to the flash memory apparatus, wherein an amount of the data is equal to the available capacity of the block; and

sending the data to the flash memory apparatus for storage.

8. The method according to claim 7, wherein the storage controller further includes a cache;

and the method further comprises;

receiving multiple write data requests, wherein each of the write data requests includes a partition of the data to be sent to the flash memory apparatus; and

the step of obtaining data to be sent to the flash memory apparatus comprising;

obtaining data to be sent to the flash memory apparatus from the cache.

9. The method according to claim 7, wherein the method further comprises:

receiving the total capacity of the block sent by the flash memory apparatus, before receiving the information of the block.

10. A method for a flash memory apparatus storing data, wherein the flash memory apparatus comprises a primary controller and a block, which includes a plurality of pages;

wherein at least one of the pages is unavailable for storage;

wherein the method performed by the primary controller comprises;

collecting information of the block, wherein the information includes capacity of one or more unavailable pages in the block;

sending the information to the storage controller;

receiving data sent by the storage controller; and

writing the data into the block.

11. The method according to claim 10, the method further comprising:

receiving a query command for inquiring the information of the block.

12. The method according to claim 10, wherein the step of sending the information to the storage controller comprises sending the information to the storage controller periodically.