JP5347061B2 - フラッシュメモリデータストレージデバイスにデータを格納するための方法及び装置 - Google Patents
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Description
本出願は、引用により全体として本明細書中に組み込まれている、2009年4月8日に出願された「データストレージデバイス(DATA STORAGE DEVICE)」と題する米国仮出願第61/167,709号、及び2009年6月17日に出願された「フラッシュメモリデータストレージデバイスにおけるパーティショニング及びストライピング(PARTITIONING AND STRIPING IN A FLASH MEMORY DATA STORAGE DEVICE)」と題する米国仮出願第61/187,835号の利益を主張するものである。
この説明は、データストレージデバイスに関する。
データストレージデバイスは、データを格納するために使用することができる。データストレージデバイスは、コンピューティングデバイスのデータストレージの必要性に備えるためにコンピューティングデバイスと共に使用することができる。場合によっては、膨大量のデータをデータストレージデバイスに格納することが望ましいこともある。また、データストレージデバイスとの間でデータの迅速な読み取り及び書き込みを行うためのコマンドを実行することが望ましい場合もある。
第1の一般的な態様において、複数のメモリチップを含むフラッシュメモリデータストレージデバイスにデータを格納する方法が開示される。方法は、データストレージデバイス内のメモリチップの数を決定することと、データストレージデバイスに結合されたホストを介して、データストレージデバイスの第1のパーティションを定義することであって、第1のパーティションは複数のメモリチップの第1のサブセットを含むことと、データストレージデバイスに結合されたホストを介して、データストレージデバイスの第2のパーティションを定義することであって、第2のパーティションは複数のメモリチップの第2のサブセットを含むこととを含む。第1のデータは、第2のパーティションからのデータの読み取り中に、第1のパーティションに書き込まれ、第1のデータは、第1のパーティションからのデータの読み取り中に、第2のパーティションに書き込まれる。
本文書は、データストレージのための装置、(1つ以上の)システム、及び技法を説明する。そのようなデータストレージ装置は、1つ以上の異なるメモリボードと共に使用されうるコントローラを有するコントローラボードを含むことができ、メモリボードは各々複数のフラッシュメモリチップを有する。データストレージ装置は、コントローラボード上のインターフェイスを使用してホストと通信することができる。このように、コントローラボード上のコントローラは、インターフェイスを使用してホストからコマンドを受信し、メモリボード上のフラッシュメモリチップを使用してそれらのコマンドを実行するように構成されてもよい。
Claims (22)
- 複数のメモリチップ(118、218、318)を含むフラッシュメモリデータストレージデバイス(100、302、501)にデータを格納する方法であって、
該データストレージデバイス(100、302、501)内のメモリチップ(118、218、318)の数を決定すること(402)と、
該データストレージデバイス(100、302、501)に結合されたホスト(106、350、551)を介して、該データストレージデバイス(100、302、501)の第1のパーティション(321)を定義すること(404)であって、該第1のパーティション(321)は該複数のメモリチップ(118、218、318)の第1のサブセットを含むことと、
該データストレージデバイス(100、302、501)に結合されたホスト(106、350、551)を介して、該データストレージデバイス(100、302、501)の第2のパーティション(322)を定義すること(406)であって、該第2のパーティション(322)は該複数のメモリチップ(118、218、318)の第2のサブセットを含むことと、
該第2のパーティション(322)からのデータの読み取り中に、第1のデータを該第1のパーティション(321)に書き込むこと(407)と、
該第1のパーティション(321)からのデータの読み取り中に、該第1のデータを該第2のパーティション(322)に書き込むこと(409)とを含む、前記方法。 - 前記第2のパーティション(322)からのデータの読み取り中に、第2のデータを前記第1のパーティション(321)に書き込むことと、
該第1のパーティション(321)からのデータの読み取り中に、該第2のデータを該第2のパーティション(322)に書き込むことと、
N=第3から少なくとも第10までに対して、
該第2のパーティション(322)からのデータの読み取り中に、第Nのデータを該第1のパーティション(321)に書き込むこと(407)と、
該第1のパーティション(321)からのデータの読み取り中に、該第Nのデータを該第2のパーティション(322)に書き込むこと(409)とをさらに含む、請求項1記載の方法。 - 前記データストレージデバイス(100、302、501)内のメモリチップ(118、218、318)の数を決定することが、該データストレージデバイス(100、302、501)内のメモリチップ(118、218、318)の該数を指示する情報を該データストレージデバイス(100、302、501)から前記ホスト(106、350、551)に送信することを含む、請求項1又は2記載の方法。
- 前記送信される情報が、特定のメモリチップ(118、218、318)と前記データストレージデバイス(100、302、501)の特定のチャネル(112)との間の接続に関する情報を含む、該データストレージデバイス(100、302、501)の物理アーキテクチャに関する情報を含む、請求項3記載の方法。
- 前記ホスト(106、350、551)において、該ホスト(106、350、551)からデータを書き込む前記データストレージデバイス(100、302、501)内のアドレス位置を定義すること(412)をさらに含み、該アドレス位置は、該データが前記複数のメモリチップ(118、218、318)のうちの特定の1つに書き込まれることを指定する、請求項1から4のいずれか1項記載の方法。
- 前記データストレージデバイス(100、302、501)が、前記ホスト(106、350、551)と前記複数のメモリチップ(118、218、318)との間のデータの通信のための複数の物理チャネル(112)を含み、各チャネルが異なる該複数のメモリチップ(118、218、318)に機能的に接続される、請求項1から5のいずれか1項記載の方法であって、
該物理チャネル(112)の数を決定すること(414)と、
該複数のチャネル(112)の第1のサブセットを決定すること(416)であって、チャネル(112)の該第1のサブセットのチャネル(112)が、メモリチップ(118、218、318)の該第1のサブセットのメモリチップ(118、218、318)のみに機能的に接続されることと、
該複数のチャネル(112)の第2のサブセットを決定すること(418)であって、チャネル(112)の該第2のサブセットのチャネル(112)が、メモリチップ(118、218、318)の該第2のサブセットのメモリチップ(118、218、318)のみに機能的に接続されることとをさらに含む、前記方法。 - 前記データストレージデバイス(100、302、501)が、前記ホスト(106、350、551)と前記複数のメモリチップ(118、218、318)との間のデータの通信のための複数の物理チャネル(112)を含む、請求項1から6のいずれか1項記載の方法であって、
該物理チャネル(112)の数を決定すること(414)をさらに含み、
該決定されたチャネル(112)が、メモリチップ(118、218、318)の前記第1のサブセットのメモリチップ(118、218、318)に機能的に接続され、メモリチップ(118、218、318)の前記第2のサブセットのメモリチップ(118、218、318)に機能的に接続される、前記方法。 - 前記ホスト(106、350、551)において、該ホスト(106、350、551)からデータを書き込む前記データストレージデバイス(100、302、501)内のアドレス位置を定義すること(420)をさらに含み、該アドレス位置は、該データが特定のチャネルを通じて前記複数のメモリチップ(118、218、318)のうちの特定の1つに書き込まれることを指定する、請求項6又は7記載の方法。
- 前記第1のサブセットが、前記第2のサブセットのメモリチップ(118、218、318)を含むことはなく、該第2のサブセットが、該第1のサブセットのメモリチップ(118、218、318)を含むことはない、請求項1から8のいずれか1項記載の方法。
- 前記第1のパーティション(321)のメモリチップに障害が生じたか又は障害が生じる可能性が高いことを示す指示を受信することと、
前記データストレージデバイス(100、302、501)に結合された前記ホスト(106、350、551)を介して、前記複数のメモリチップ(118、218、318)の第3のサブセットを含むように該データストレージデバイス(100、302、501)の該第1のパーティション(321)を再定義すること(422)とをさらに含み、
該第3のサブセットが前記第1のサブセットとは異なり、
該第3のサブセットは、前記第2のサブセットのメモリチップ(118、218、318)を含むことはなく、該第2のサブセットは、該第3のサブセットのメモリチップ(118、218、318)を含むことはない、請求項1から9のいずれか1項記載の方法。 - 前記第1のパーティション(321)を再定義することが、障害が生じたか又は障害発生に近づきつつあるメモリチップを除いた前記第3のサブセットをメモリチップ(118、218、318)の前記第1のサブセットとして定義することを含む、請求項10記載の方法。
- 複数のメモリチップ(118、218、318)を含むフラッシュメモリデータストレージデバイス(100、302、501)と、
インターフェイスを介して該データストレージデバイス(100、302、501)に機能的に結合されたホスト(106、350、551)であって、
該データストレージデバイス(100、302、501)内のメモリチップ(118、218、318)の数を検出するように構成された構成検出エンジン(358)と、
該データストレージデバイス(100、302、501)の第1のパーティション(321)及び該データストレージデバイス(100、302、501)の第2のパーティション(322)を定義するように構成され、該第1のパーティション(321)が該複数のメモリチップ(118、218、318)の第1のサブセットを含み、該第2のパーティション(322)が該複数のメモリチップ(118、218、318)の第2のサブセットを含む、パーティションエンジン(360)と、
該第2のパーティション(322)からのデータの読み取り中に、第1のデータを該第1のパーティション(321)に書き込み、
該第1のパーティション(321)からのデータの読み取り中に、該第1のデータを該第2のパーティション(322)に書き込むように構成されたドライバ(362)とを備える、前記ホスト(106、350、551)とを備える、装置。 - 前記ドライバ(362)が、
第2のデータを前記第1のパーティション(321)に書き込み、
該第2のデータが該第1のパーティション(321)に書き込まれている間に、前記第2のパーティション(322)からデータを読み取り、
該第1のパーティション(321)からのデータの読み取り中に、該第2のデータを該第2のパーティション(322)に書き込み、
N=第3から少なくとも第10までに対して、
第Nのデータを該第1のパーティション(321)に書き込み、
該第Nのデータが該第1のパーティション(321)に書き込まれている間に、該第2のパーティション(322)からデータを読み取り、
該第1のパーティション(321)からのデータの読み取り中に、該第Nのデータを該第2のパーティション(322)に書き込むようにさらに構成される、請求項12記載の装置。 - 前記データストレージデバイス(100、302、501)が、前記ホスト(106、350、551)からコマンドを受信すると、該データストレージデバイス(100、302、501)内のメモリチップ(118、218、318)の数を指示する情報を該データストレージデバイス(100、302、501)から該ホスト(106、350、551)に送信するように構成される、請求項12又は13記載の装置。
- 前記送信される情報が、特定のメモリチップ(118、218、318)と前記データストレージデバイス(100、302、501)の特定のチャネル(112)との間の接続に関する情報を含む、該データストレージデバイス(100、302、501)の物理アーキテクチャに関する情報を含む、請求項14記載の装置。
- 前記ホスト(106、350、551)が、前記データストレージデバイス(100、302、501)に書き込まれるデータにメモリアドレスを割り当てるように構成されたアドレス割り当てエンジン(366、572)をさらに備え、該割り当てられるメモリアドレスは、該データが前記複数のメモリチップ(118、218、318)のうちの特定の1つに書き込まれることを指定する、請求項12から15のいずれか1項記載の装置。
- 前記データストレージデバイス(100、302、501)が、前記ホスト(106、350、551)と前記複数のメモリチップ(118、218、318)との間のデータの通信のための複数の物理チャネル(112)を含み、各チャネルが異なる該複数のメモリチップ(118、218、318)に機能的に接続され、
前記構成検出エンジンが、該物理チャネル(112)の数を検出するようにさらに構成され、
前記パーティションエンジンが、該複数のチャネル(112)の第1のサブセットを決定するようにさらに構成され、チャネル(112)の該第1のサブセットのチャネル(112)が、メモリチップ(118、218、318)の該第1のサブセットのメモリチップ(118、218、318)のみに機能的に接続され、
該パーティションエンジンが、該複数のチャネル(112)の第2のサブセットを決定するようにさらに構成され、チャネル(112)の該第2のサブセットのチャネル(112)が、メモリチップ(118、218、318)の該第2のサブセットのメモリチップ(118、218、318)のみに機能的に接続される、請求項12から16のいずれか1項記載の装置。 - 前記ホスト(106、350、551)が、前記データストレージデバイス(100、302、501)に書き込まれるデータにメモリアドレスを割り当てるように構成されたアドレス割り当てエンジン(366、572)をさらに備え、該割り当てられるメモリアドレスが、該データが特定のチャネルを通じて前記複数のメモリチップ(118、218、318)のうちの特定の1つに書き込まれることを指定する、請求項17記載の装置。
- 前記第1のパーティション(321)が、単一のチャネルに機能的に接続されるメモリチップ(118、218、318)を含む、請求項12から18のいずれか1項記載の装置。
- 前記データストレージデバイス(100、302、501)が、前記ホスト(106、350、551)と前記複数のメモリチップ(118、218、318)との間のデータの通信のための複数の物理チャネル(112)を含み、該複数の物理チャネル(112)がメモリチップ(118、218、318)の前記第1のサブセットのメモリチップ(118、218、318)に機能的に接続され、メモリチップ(118、218、318)の前記第2のサブセットのメモリチップ(118、218、318)に機能的に接続される、請求項12から19のいずれか1項記載の装置。
- 前記パーティションエンジンが、
前記第1のパーティション(321)のメモリチップに障害が生じたか又は障害が生じる可能性が高いことを示す指示を受信し、
前記複数のメモリチップ(118、218、318)の第3のサブセットを含むように前記データストレージデバイス(100、302、501)の該第1のパーティション(321)を再定義するようにさらに構成され、
該第3のサブセットが前記第1のサブセットとは異なり、
該第3のサブセットが、前記第2のサブセットのメモリチップ(118、218、318)を含むことはなく、該第2のサブセットは、該第3のサブセットのメモリチップ(118、218、318)を含むことはない、請求項12から20のいずれか1項記載の装置。 - 前記複数のメモリチップ(118、218、318)の前記第3のサブセットを含むように前記第1のパーティション(321)を再定義することが、障害が生じたか又は障害発生に近づきつつあるメモリチップを除いた該第3のサブセットをメモリチップ(118、218、318)の前記第1のサブセットとして定義することを含む、請求項21記載の装置。
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