JP2019192221A - メモリシステム及びその動作方法 - Google Patents
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Abstract
Description
Claims (23)
- ユーザ領域及びオーバープロビジョニング領域を各々含む複数のメモリ装置と、
前記複数のメモリ装置の各々を制御するコントローラと、
を備え、
前記コントローラは、
前記複数のメモリ装置のうち、欠陥メモリ装置を検出する検出部と、
前記複数のメモリ装置のうち、前記欠陥メモリ装置を除いた可用メモリ装置を選択する選択部と、
前記欠陥メモリ装置に格納されたターゲットデータを前記可用メモリ装置の前記オーバープロビジョニング領域に移動させるプロセッサと、
を備えるメモリシステム。 - 前記コントローラは、
複数のメモリ装置の各OP領域の可用情報を格納する管理部をさらに備え、
前記選択部は、前記可用情報に基づいて、前記複数のメモリ装置のうち、欠陥メモリ装置を除いた可用メモリ装置を選択する請求項1に記載のメモリシステム。 - 前記検出部は、
前記複数のメモリ装置の各々に対応する信頼度に関する情報をモニタリングして、予め設定された閾値より低い信頼度に関する情報を有するメモリ装置を前記欠陥メモリ装置として検出する請求項1に記載のメモリシステム。 - 前記管理部は、
前記複数のメモリ装置の各々のメモリマップを格納する請求項2に記載のメモリシステム。 - 前記管理部は、
前記ターゲットデータが前記オーバープロビジョニング領域に移動された後、前記メモリマップをアップデートする請求項4に記載のメモリシステム。 - 前記可用メモリ装置が複数である場合、
前記選択部は、
前記可用メモリ装置のうち、少なくとも1つのメモリ装置を選択する請求項1に記載のメモリシステム。 - 前記欠陥メモリ装置が復旧された後、
前記プロセッサは、前記ターゲットデータを前記復旧されたメモリ装置に移動させる請求項1に記載のメモリシステム。 - 前記検出部は、
前記復旧されたメモリ装置の信頼度に関する情報ををアップデートする請求項7に記載のメモリシステム。 - 複数のメモリ装置の各OP領域の可用情報を格納する管理部をさらに備え、
前記選択部は、
前記可用情報に基づいて、前記複数のメモリ装置のうち、欠陥メモリ装置を除いた可用メモリ装置を選択し、
前記管理部は、
前記ターゲットデータに対応する移動動作が終了した後、前記メモリマップをアップデートする請求項7に記載のメモリシステム。 - 前記管理部は、
可用OP領域と不可用OP領域の両方に対する各OP領域の可用情報を格納する請求項2に記載のメモリシステム。 - メモリシステムの動作方法において、
複数のメモリ装置のうち、欠陥メモリ装置を検出するステップと、
前記複数のメモリ装置のうち、前記欠陥メモリ装置を除いた可用メモリ装置を選択するステップと、
前記欠陥メモリ装置に格納されたターゲットデータを前記可用メモリ装置の前記オーバープロビジョニング領域に移動させるステップと、
を含むメモリシステムの動作方法。 - 前記メモリ装置の各々のオーバープロビジョニング領域の可用情報を格納するステップをさらに含み、
前記複数のメモリ装置のうち、前記欠陥メモリ装置を除いた可用メモリ装置を選択するステップは、前記可用情報に基づく請求項11に記載のメモリシステムの動作方法。 - 前記検出するステップは、
前記複数のメモリ装置の各々に対応する信頼度に関する情報をモニタリングして、予め設定された閾値より低い値の信頼度に関する情報を有するメモリ装置を前記欠陥メモリ装置として検出する請求項11に記載のメモリシステムの動作方法。 - 前記複数のメモリ装置の各々のメモリマップを格納するステップをさらに含む請求項11に記載のメモリシステムの動作方法。
- 前記ターゲットデータが前記オーバープロビジョニング領域に移動された後、前記メモリマップをアップデートするステップをさらに含む請求項14に記載のメモリシステムの動作方法。
- 前記可用メモリ装置が複数である場合、
前記可用メモリ装置を選択するステップは、
予め設定された基準にしたがって前記可用メモリ装置のうち、少なくとも1つのメモリ装置を選択する請求項11に記載のメモリシステムの動作方法。 - 前記欠陥メモリ装置が復旧されて復旧メモリ装置となった場合、
前記ターゲットデータを復旧メモリ装置に移動させるステップをさらに含む請求項11に記載のメモリシステムの動作方法。 - 前記復旧メモリ装置に対応する信頼度に関する情報をアップデートするステップをさらに含む請求項17に記載のメモリシステムの動作方法。
- 前記ターゲットデータに対応する移動動作が終了した後、前記メモリマップをアップデートするステップをさらに含む請求項17に記載のメモリシステムの動作方法。
- 複数のメモリシステムと、
前記複数のメモリシステムの各々と通信するメモリシステム管理部と、
を備え、
前記複数のメモリシステムの各々は、
ユーザ領域及びオーバープロビジョニング領域を各々含む複数のメモリ装置及び前記複数のメモリ装置の各々を制御するコントローラを備え、
前記コントローラは、
前記複数のメモリ装置の各々に対応する信頼度に関する情報ををモニタリングして、予め設定された閾値より小さい値の信頼度に関する情報を有するメモリ装置を前記欠陥メモリ装置として検出する検出部と、
前記複数のメモリ装置の各々の前記オーバープロビジョニング領域の可用情報を格納し、前記複数のメモリ装置の各々のメモリマップを格納する管理部と、
前記可用情報に基づいて、前記複数のメモリ装置のうち、前記欠陥メモリ装置を除いた可用メモリ装置を選択する選択部と、
前記欠陥メモリ装置に格納されたターゲットデータを前記可用メモリ装置の前記オーバープロビジョニング領域に移動させるプロセッサと、
を備えるコンピュータシステム。 - 前記MMUは、
前記複数のメモリ装置の各々の信頼度に関する情報、前記可用情報及び前記メモリマップを前記複数のメモリシステムの各々から伝達されて格納する請求項20に記載のコンピュータシステム。 - 第1のメモリシステムに前記欠陥メモリ装置が発生され、前記可用メモリ装置が存在しない場合、
前記第1のメモリシステムは、ターゲットデータを前記MMUに伝達し、
前記MMUは、前記可用情報に基づいて、前記ターゲットデータを第2のメモリシステムに伝達し、
前記第2のメモリシステムは、前記MMUから伝達された前記ターゲットデータを前記可用メモリ装置の前記オーバープロビジョニング領域に格納する請求項21に記載のコンピュータシステム。 - 前記欠陥メモリ装置が復旧された場合、
前記第2のメモリシステムは、前記ターゲットデータを前記オーバープロビジョニング領域で読み出して前記MMUに伝達し、
前記MMUは、前記ターゲットデータを前記第1のメモリシステムに伝達し、
前記第1のメモリシステムは、前記ターゲットデータを復旧メモリ装置に格納する請求項20に記載のコンピュータシステム。
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US20190324664A1 (en) | 2019-10-24 |
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