JPH11512544A - 半導体不揮発性大容量記憶メモリ内の自動摩耗レベリングによるシステム・データ制御の方法およびアーキテクチャ - Google Patents
半導体不揮発性大容量記憶メモリ内の自動摩耗レベリングによるシステム・データ制御の方法およびアーキテクチャInfo
- Publication number
- JPH11512544A JPH11512544A JP9512147A JP51214797A JPH11512544A JP H11512544 A JPH11512544 A JP H11512544A JP 9512147 A JP9512147 A JP 9512147A JP 51214797 A JP51214797 A JP 51214797A JP H11512544 A JPH11512544 A JP H11512544A
- Authority
- JP
- Japan
- Prior art keywords
- cluster
- sector
- memory
- mass storage
- sectors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
- G11C16/102—External programming circuits, e.g. EPROM programmers; In-circuit programming or reprogramming; EPROM emulators
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/20—Employing a main memory using a specific memory technology
- G06F2212/202—Non-volatile memory
- G06F2212/2022—Flash memory
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0662—Virtualisation aspects
- G06F3/0664—Virtualisation aspects at device level, e.g. emulation of a storage device or system
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.データを記憶するための個別にアドレス可能な複数のセクタを含み、 a.ユーザ・ファイルを記憶するための複数のセクタを有する、半導体不揮発 性大容量記憶メモリ内の第1の区画と、 b.システム・ファイルを記憶するための半導体不揮発性大容量記憶メモリ内 の第2の区画であって、その区画は、さらに複数のクラスタを含み、各クラスタ が複数のセクタを有し、各クラスタが、そのクラスタ内の一つのセクタ内に所定 の論理ブロック・アドレスに対してシステム・セクタを記憶する第2の区画と、 c.そのクラスタ内の空のセクタ中に置換システム・セクタを書き込み、かつ 置換システム・セクタに指標を与える制御回路と を含む半導体不揮発性大容量記憶メモリ。 2.さらに、前のクラスタが一杯になったときに、後続の置換システム・ファイ ルを受け取るための空のクラスタを含む請求項1に記載の半導体不揮発性大容量 記憶メモリ。 3.各エントリが論理ブロック・アドレスに関連するセクタが古いかどうかを示 すフラグをも含む請求項2に記載の半導体不揮発性大容量記憶メモリ。 4.各セクタが、そのセクタが使用されているかどうかを示すフラグをも含む請 求項3に記載の半導体不揮発性大容量記憶メモリ。 5.各セクタが、そのセクタが欠陥を有するかどうかを示すフラグをも含む請求 項3に記載の半導体不揮発性大容量記憶メモリ。 6.a.各クラスタが複数のセクタを有し、各クラスタがそのクラスタ内の一つ のセクタ中に一つの論理ブロック・アドレスのためのシステム・セクタを記憶す る、複数のクラスタを有するシステム・ファイルを記憶するための区画を含む半 導体不揮発性大容量記憶メモリと、 b.半導体不揮発性大容量記憶メモリに結合され、半導体不揮発性大容量記憶 メモリとの間の制御メモリ・アクセス・オペレーティングを制御する制御回路と を含むデータを記憶するためのメモリ・システム。 7.書き込みオペレーティングが、適当な論理ブロック・アドレスに対応するク ラスタの中の空のセクタの中に置換システム・セクタを書き込むことによって完 了する請求項6に記載のメモリ・システム。 8.半導体不揮発性大容量記憶メモリがさらに、前のクラスタが満杯になったと きに後続のシステム・ファイルを記憶する空のクラスタを含む請求項7に記載の メモリ・システム。 9.さらに、制御回路と半導体不揮発性大容量記憶メモリに結合さ、各論理ブロ ック・アドレスの現在の位置に関する情報を記憶する表を含み、その表が複数の アドレス可能なエントリを含み、各エントリが論理ブロック・アドレスに対応し 、さらに各エントリがセクタの対応する物理ブロック・アドレスを含むように構 成される請求項8に記載のメモリ・システム。 10.表がランダム・アクセス・メモリ内に記憶される請求項9に記載のメモリ ・システム。 11.表が論理ブロック・アドレスに対応する各クラスタを読み取ることによっ て復元される請求項10に記載のメモリ・システム。 12.表中の各エントリが、論理ブロック・アドレスに対応するクラスタが使用 されているかどうかを示すフラグを含む請求項11に記載のメモリ・システム。 13.表中の各エントリが、論理ブロック・アドレスに対応するクラスタが欠陥 を有するかどうかを示すフラグを含む請求項12に記載のメモリ・システム。 14.表中の各エントリがさらに、論理ブロック・アドレスに対応するクラスタ 内の現在のセクタの表示を含む請求項11に記載のメモリ・システム。 15.a.複数のユーザ・ファイルを記憶するための複数のセクタを有する第1 群と、複数のシステム・ファイルを記憶するための複数のセクタを有する第2群 とにメモリを区分するステップと、 b.各クラスタが複数のセクタを有し、各クラスタがそのクラスタ内の一つの セクタ中に単一の論理ブロック・アドレスのためのシステム・セクタを記憶する ように、第2群をクラスタに区分するステップと、 c.そのクラスタ中のどのセクタが空のセクタであるかを決定するステップと 、 d.その空のセクタに置換システム・ファイルを書き込むステップと、 e.現在のおよび置換されシステム・セクタに標識を与えるステップと、 f.そのクラスタ内の最後のセクタが置換され、そのクラスタ内にフリー・セ クタがないとき、クラスタにoldとマークを付けるステップと、 を含む、半導体不揮発性大容量記憶メモリに情報を記憶すせる方法。 16.さらに、前のクラスタが満杯になったとき、次の置換システム・セクタを 空のクラスタに書き込むステップを含む請求項15に記載の方法。 17.さらに、古いシステム・セクタのみを有するクラスタを消去するステップ を含む請求項16に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/527,484 US5835935A (en) | 1995-09-13 | 1995-09-13 | Method of and architecture for controlling system data with automatic wear leveling in a semiconductor non-volatile mass storage memory |
US08/527,484 | 1995-09-13 | ||
PCT/US1996/014750 WO1997010604A1 (en) | 1995-09-13 | 1996-09-12 | Method of and architecture for controlling system data with automatic wear leveling in a semiconductor non-volatile mass storage memory |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11512544A true JPH11512544A (ja) | 1999-10-26 |
JP4399029B2 JP4399029B2 (ja) | 2010-01-13 |
Family
ID=24101644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51214797A Expired - Lifetime JP4399029B2 (ja) | 1995-09-13 | 1996-09-12 | 半導体不揮発性大容量記憶メモリ内の自動摩耗レベリングによるシステム・データ制御の方法およびアーキテクチャ |
Country Status (4)
Country | Link |
---|---|
US (1) | US5835935A (ja) |
JP (1) | JP4399029B2 (ja) |
AU (1) | AU7071796A (ja) |
WO (1) | WO1997010604A1 (ja) |
Cited By (5)
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JP2001249855A (ja) * | 2000-03-07 | 2001-09-14 | Hitachi Ltd | 不揮発性メモリのデータ書き替え方法及び加入者回路 |
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JP2005182793A (ja) * | 2003-12-19 | 2005-07-07 | Lexar Media Inc | 頻繁にアクセスされたセクタの動作による不揮発性メモリに対するより速い書込み動作 |
JP2008226254A (ja) * | 2001-01-19 | 2008-09-25 | Sandisk Corp | 不揮発性メモリにおける部分的ブロックデータのプログラミング動作および読出し動作 |
JP2010518491A (ja) * | 2007-01-31 | 2010-05-27 | マイクロソフト コーポレーション | フラッシュドライブの寿命の延長 |
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WO1997010604A1 (en) | 1997-03-20 |
AU7071796A (en) | 1997-04-01 |
JP4399029B2 (ja) | 2010-01-13 |
US5835935A (en) | 1998-11-10 |
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