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| 研究生： |
廖涵語 Han-Yu Liao |
|---|---|
| 論文名稱： |
透過 G State 重複寫來拯救 3D TLC 快閃記憶體的老化現象 Rescuing the Aging of 3D TLC NAND Flash Cells with G State Reprogramming |
| 指導教授： |
謝仁偉
Jen-Wei Hsieh |
| 口試委員: |
張原豪
陳奕伸 吳晉賢 陳雅淑 |
| 學位類別： |
碩士 Master |
| 系所名稱： |
電資學院 - 資訊工程系 Department of Computer Science and Information Engineering |
| 論文出版年： | 2023 |
| 畢業學年度： | 112 |
| 語文別： | 英文 |
| 論文頁數： | 30 |
| 中文關鍵詞： | 快閃記憶體 、非揮發 、可靠性 、編碼 、重編寫 、保留時間 |
| 外文關鍵詞： | NAND flash, Non-volatile, Reliability, Encoding, Reprogramming, Retention times |
| 相關次數： | 點閱：73 下載：7 |
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3D NAND 快閃記憶體因其非揮發性和出色的資料存取效能而成為現代電腦系統中最重要的儲存技術之一。然而，因為其固有的特性，導致它面臨老化和可靠性問題。先前有研究嘗試使用額外編碼的技術來恢復資料，相比之下，我們則提出了一種稱為 CellRejuvo 的新型重編寫技術來提高 NAND 快閃記憶體單元的可靠性。 據我們所知，CellRejuvo 是第一個巧妙利用重新寫入來減輕單元老化並延長 SSD 壽命的技術。
我們在真實 3D NAND 快閃記憶體的 SSD 上實作 CellRejuvo，並評估其在各種實際工作負載上的能力。大量的實驗結果表明，CellRejuvo 在各種保留時間下成功地將 SSD 的錯誤率平均降低了 38.28%。
3D NAND flash memory is one of the most important storage technologies in modern computer systems because of its non-volatile nature and excellent data access performance. However, it suffers from aging and reliability issues due to its inherent property. In contrast to the previous research that tried to recover the data with additional encoding techniques, we propose a novel reprogramming technique, called CellRejuvo, to improve the reliability of NAND Flash cells. To the best of our knowledge, CellRejuvo is the first data recovery technique that cleverly leverages reprogramming to alleviate cell aging, extending the SSD lifetime.
We implement CellRejuvo on a real 3D NAND flash-based SSD and evaluate its capability on various realistic workloads. The extensive experimental results show that CellRejuvo successfully reduces the error rate of SSD by an average of 38.28% under various retention times.
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