Extending Lifetime For Non-volatile Memory Apparatus

• US 20130311700A1
• Filed: 05/20/2012
• Published: 11/21/2013
• Est. Priority Date: 05/20/2012
• Status: Abandoned Application

• Current Assignee: Transcend Information Incorporated
• Original Assignee: Transcend Information Incorporated
• Inventors: Chen, Chung-Jwu
• Application Number:
  US13/476,011
• Publication Number:
  US 20130311700A1
• Time in Patent Office: Days
• US Class Current: 711/103
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 12/0292 using tables or multilevel address translation means G06F12/023 takes precedence; address translation in virtual memory systems G06F12/10
• CPC Class Codes: G06F 2212/7204 Capacity control, e.g. partitioning, end-of-life degradation

Abstract

A non-volatile memory apparatus includes non-volatile memory having a user block and a reserved block, a first connector for connecting to a host device, at least one second connector for connecting to a storage medium, and a first controller connected to the non-volatile memory, the first connector and the at least one second connector. Memory blocks of the storage medium are used as extra reserved blocks for the non-volatile memory apparatus. The first controller controls and remaps the user blocks and reserved blocks of the non-volatile memory, and the memory blocks of the storage medium.

Claims

1. A non-volatile memory apparatus comprising:

non-volatile memory comprising user blocks for data storage and reserved blocks;

a first connector for connecting to a host device;

at least one second connector for connecting to a storage medium, wherein memory blocks of the storage medium are used as extra reserved blocks for the non-volatile memory apparatus; and

a first controller connected to the non-volatile memory, the first connector and the at least one second connector, for controlling and remapping the user blocks and reserved blocks of the non-volatile memory, and the memory blocks of the storage medium.

2. The non-volatile memory apparatus of claim 1, wherein the first controller uses the memory blocks of the storage medium as extra reserved blocks when number of the reserved blocks of the non-volatile memory apparatus is less than a preset spare blocks threshold.

3. The non-volatile memory apparatus of claim 2, wherein the first controller determines whether the number of the reserved blocks of the non-volatile memory apparatus is less than the preset spare blocks threshold.

4. The non-volatile memory apparatus of claim 1, wherein the first controller is configured to request a mapping table from a second controller of the storage medium, and allocate reserved blocks of the mapping table as reserved blocks for use by the non-volatile memory apparatus to generate an updated mapping table.

5. The non-volatile memory apparatus of claim 1, wherein the first controller is configured to detect a number of the spare reserved blocks of the non-volatile memory, compare the number to the spare blocks threshold, and issue an alert when the number is less than the preset spare blocks threshold and no storage medium is connected to the non-volatile memory apparatus.

6. The non-volatile memory apparatus of claim 1, wherein the second connector is a network connector, and the storage medium is a network drive.

7. A non-volatile memory system comprising:

a storage medium comprising;

first non-volatile memory comprising a plurality of memory blocks; and

a first connector; and

a non-volatile memory apparatus comprising;

second non-volatile memory comprising user blocks and reserved blocks;

a second connector for connecting to a host device;

a third connector for connecting to the first connector of the storage medium; and

a first controller for remapping the user blocks by using at least one of the plurality of memory blocks of the storage medium.

8. The non-volatile memory system of claim 7, wherein the at least one of the plurality of memory blocks of the storage medium comprises at least one reserved block of the first non-volatile memory.

9. The non-volatile memory system of claim 7, wherein the storage medium further comprises a second controller.

10. The non-volatile memory system of claim 7, wherein the first controller determines whether a number of reserved blocks of the non-volatile memory apparatus is less than a preset spare blocks threshold, and the first controller allocates the at least one memory block of the storage medium as a reserved block of the non-volatile memory apparatus when the number of reserved blocks of the non-volatile memory apparatus is less than the preset spare blocks threshold.

11. The non-volatile memory system of claim 7, wherein the first controller requests a mapping table from the second controller, allocates reserved blocks of the mapping table as reserved blocks for use by the non-volatile memory apparatus to generate an updated mapping table, and sends the updated mapping table to the controller of the storage medium.

12. The non-volatile memory system of claim 7, wherein the first connector and the third connector are network connectors.

13. A lifetime extending method for a non-volatile memory apparatus, comprising:

performing a block monitoring on the non-volatile memory apparatus to monitor if a number of spare blocks of the non-volatile memory apparatus is less than a preset spare blocks threshold;

providing a low reserved block alert from the non-volatile memory apparatus to a storage medium through a connector when the number of spare blocks of the non-volatile memory apparatus is less than the preset spare blocks threshold;

receiving a mapping table sent from the storage medium to a controller of the non-volatile memory apparatus; and

generating an updated mapping table on the non-volatile memory apparatus.

14. The lifetime extending method of claim 13, wherein the step of generating an updated mapping table on the non-volatile memory apparatus comprises:

remapping bad blocks of the non-volatile memory apparatus to available memory blocks of the storage medium.