Green NAND SSD application and driver

• US 9,389,952 B2
• Filed: 11/17/2014
• Issued: 07/12/2016
• Est. Priority Date: 06/18/2008
• Status: Expired due to Fees

• Current Assignee: Super Talent Technology, Corporation
• Original Assignee: Super Talent Technology, Corporation
• Inventors: Zhou, Yan, Yu, Frank, Ma, Abraham C., Chen, Shimon, Chang, Yao-Tse
• Primary Examiner(s): Chase, Shelly A
• Application Number:
  US14/543,472
• Publication Number:
  US 20160139982A1
• Time in Patent Office: 603 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1016 Error in accessing a memory location, i.e. addressing error
• CPC Class Codes: G06F 11/1044 with specific ECC/EDC distribution
• CPC Class Codes: G06F 11/1072 in multilevel memories
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 12/0804 with main memory updating G06F12/0806 takes precedence
• CPC Class Codes: G06F 12/1009 using page tables, e.g. page table structures
• CPC Class Codes: G06F 12/1408 by using cryptography for digital transmission H04L9/00
• CPC Class Codes: G06F 16/172 Caching, prefetching or hoarding of files
• CPC Class Codes: G06F 2212/1036 Life time enhancement
• CPC Class Codes: G06F 2212/2022 Flash memory
• CPC Class Codes: G06F 2212/60 Details of cache memory
• CPC Class Codes: G06F 2212/7201 Logical to physical mapping or translation of blocks or pages
• CPC Class Codes: G11C 14/0018 whereby the nonvolatile element is an EEPROM element, e.g. a floating gate or metal-nitride-oxide-silicon [MNOS] transistor
• CPC Class Codes: G11C 29/52 Protection of memory contents; Detection of errors in memory contents
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/152 Bose-Chaudhuri-Hocquenghem [BCH] codes
• CPC Class Codes: H03M 13/19 Single error correction without using particular properties of the cyclic codes, e.g. Hamming codes, extended or generalised Hamming codes
• CPC Class Codes: H03M 13/353 Adaptation to the channel
• CPC Class Codes: H03M 13/356 Unequal error protection [UEP]

Abstract

A GNSD (Green NAND Solid State Drive) Driver coupled to host DRAM, and having a memory manager, a data grouper engine, a data ungrouper engine, a power manager, and a flush/resume manager. The GNSD driver is coupled to a GNSD application, and the host DRAM to a Non-Volatile Memory Device. The GNSD Driver further includes a compression/decompression engine, a de-duplication engine, an encryption/decryption engine, or a high-level error correction code engine. The encryption/decryption engine encrypts according to DES (Data Encryption Standard) or AES (Advanced Encryption Standard). A method of operating a GNSD Driver and a GNSD application coupled to DRAM of a host, includes coupling: Configuration and Register O/S Settings to the host and the GNSD Application; a data grouper and data ungrouper to the host DRAM and to Upper and a Lower Filter; a power manager and a memory manager to the host; a flush/resume manager to the DRAM; and the DRAM to an (Super Enhanced Endurance Device) SEED SSD (Solid State Drive).

Claims

1. A Green NAND Solid State Drive (GNSD) Driver coupled to host DRAM, comprising:

a memory manager, coupled to an Upper filter; and

a data grouper engine coupled to the host DRAM;

a data ungrouper engine coupled to the host DRAM;

a power manager coupled to the memory manager; and

a flush/resume manager coupled to the memory manager,

wherein the GNSD driver is coupled to a GNSD application, and

wherein the host DRAM is coupled to a Non-Volatile Memory Device.

2. The GNSD Driver of claim 1, further comprising one of:

a compression/decompression engine, coupled to a File System filter;

a de-duplication engine, coupled to a File System filter;

an encryption/decryption engine, coupled to a File System filter;

or

a high-level error correction code engine, coupled to a Lower filter.

3. The GNSD Driver of claim 2, wherein the encryption/decryption engine is configured to encrypt one of a Data Encryption Standard or an Advanced Encryption Standard.

4. A GNSD Driver coupled to DRAM of a host, comprising:

a data grouper;

a data write cache of the DRAM, coupled to the data grouper;

a data ungrouper; and

a data read cache of the DRAM, coupled to the data ungrouper,

wherein the data grouper and the data ungrouper are coupled to an Upper Filter, and a Lower Filter, and

wherein the GNSD driver is coupled to a GNSD application, and

wherein the DRAM is coupled to a Non-Volatile Memory Device.

5. The GNSD Driver of claim 4, further comprising one of:

a compression/decompression engine, coupled to the File System Filter;

a de-duplication engine, coupled to the File System Filter;

an encryption/decryption engine, coupled to the File System Filter;

or

a high-level error correction code engine, coupled to the Lower Filter.

6. The GNSD Driver of claim 4, further comprising:

a SMART data monitor, coupled to a super enhanced endurance device SSD; and

a security engine, coupled to the host.

7. The GNSD Driver of claim 5, wherein the high-level error correction code engine uses one of a graph-based code or an algebraic code.

8. The GNSD Driver of claim 7, wherein the high-level error correction code engine employs a low-density parity code graph-based code.

9. The GNSD Driver of claim 4, wherein the data grouper and data ungrouper are each coupled to:

a metapage grouper for user data;

a metapage grouper for FDB; and

a metapage grouper for pagefile pages.

10. A method of operating a GNSD Driver and a GNSD application coupled to host DRAM of a host, comprising:

coupling Configuration and Register O/S Settings to the host and to the GNSD Application;

coupling a data grouper engine of the GNSD driver to the host DRAM;

coupling a data ungrouper engine of the GNSD driver to the host DRAM;

coupling a power manager of the GNSD driver to the host;

coupling a memory manager of the GNSD driver to the host;

coupling a flush/resume manager of the GNSD driver to the host DRAM; and

coupling the data grouper engine and the data ungrouper engine of the GNSD driver to an Upper Filter and a Lower Filter; and

coupling the DRAM to an Super Enhanced Endurance Device (SEED) SSD; and

one of;

disabling drive indexing, disabling drive search indexing, reducing page file size, disabling system restore, disabling hibernate, disabling prefetch, reducing recycle bin size, disabling defragmentation, reducing logging; and

disabling performance monitoring, disabling write caching, or disabling write cache buffer flushing,

wherein SEED SSD endurance is increased to more than specified and write amplification is reduced to less than specified.

11. The method of claim 10, further comprising:

synchronizing a weak table to a weak table of blocks of the SEED SSD;

generating high level error correction code (ECC) data for page data in the weak table, providing generated high level ECC data;

storing the generated high level ECC data in one of a cache area in the host DRAM, or in a spare portion of the SEED SSD; and

writing the page data indicated by the weak table.

12. The method of claim 11, further comprising:

reading data in a page by the ECC engine;

if the data in the page is determined to be corrupted by the SEED SSD native ECC engine;

reading by the ECC engine the generated high level ECC data of the weak table to which the corrupted page data pertains; and

correcting the corrupted page data with the generated high level ECC data using the ECC engine.

13. The method of claim 10, further comprising:

grouping user data into a first metapage;

grouping system FDB into a second metapage;

grouping pagefile pages into a third metapage; and

storing the first second, and third metapages to a SEED SSD storage volume.

14. The method of claim 10, further comprising:

providing an Endurance Translation Layer (ETL) controlling access to flash memory in a SEED SSD and to a DRAM buffer;

inspecting, by the ETL, a block of flash memory, and

one of;

identifying, by the ETL, the block as a bad block if the total error bits exceed a predetermined high level threshold, or

entering, by the ETL, the block into a weak table if the total error bits exceed a predetermined low level threshold; and

synchronizing the weak table to the GNSD Driver coupled to the DRAM.

15. A GNSD application coupled to host DRAM, comprising one of:

an SSD housecleaning module coupled to a GNSD driver;

a DRAM allocation module coupled to a GNSD driver;

a driver installation module coupled to a GNSD driver;

or

a cache mode on/off switch coupled to a GNSD driver.

16. A computer system host comprising:

a GNSD driver coupled to a data grouper and a data ungrouper in the computer system host;

a GNSD application coupled to the GNSD driver and to the computer system host;

wherein the data grouper and the data ungrouper of GNSD Driver are coupled to an Upper Filter and a Lower Filter of the computer system host, and

the computer system host is coupled to a Non-Volatile Memory Device.

17. The computer system host of claim 16, further comprising Configuration and Register O/S Settings coupled to the computer system host.

18. A method of increasing endurance of a non-volatile flash memory, comprising:

coupling a GNSD Driver having an ECC engine to host DRAM;

coupling a SEED SSD to host DRAM;

generating high level ECC for selected data in the SEED SSD using the host DRAM; and

using the high level ECC to correct corrupted data from the SEED SSD.

19. The method of increasing endurance of claim 18, further comprising:

synchronizing a weak table to a weak table of blocks with the SEED SSD;

generating high level error correction code (ECC) data for page data in the weak table, producing generated high level ECC data;

storing the generated high level ECC data in one of a DRAM cache area or a spare portion of the SEED SSD; and

writing the page data indicated to the weak table.

20. The method of increasing endurance of claim 18, further comprising:

reading data in a page;

if the data in the page is corrupted by the SEED SSD native ECC engine;

reading the generated high level ECC data of the weak table to which the page pertains; and

correcting the corrupted data in the page with the generated high level ECC data.