发明授权
- 专利标题: Mixed granularity higher-level redundancy for non-volatile memory
- 专利标题(中): 非易失性存储器的混合粒度更高级冗余
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申请号: US14507140申请日: 2014-10-06
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公开(公告)号: US09323612B2公开(公告)日: 2016-04-26
- 发明人: Zhengang Chen , Yunxiang Wu
- 申请人: SEAGATE TECHNOLOGY LLC
- 代理机构: IP Legal Services LLC
- 代理商 Ian Hughes; Scott McLellan
- 主分类号: G06F11/00
- IPC分类号: G06F11/00 ; G06F11/10 ; G11C29/52
摘要:
Mixed-granularity higher-level redundancy for NVM provides improved higher-level redundancy operation with better error recovery and/or reduced redundancy information overhead. For example, pages of the NVM that are less reliable, such as relatively more prone to errors, are operated in higher-level redundancy modes having relatively more error protection, at a cost of relatively more redundancy information. Concurrently, blocks of the NVM that are more reliable are operated in higher-level redundancy modes having relatively less error protection, at a cost of relatively less redundancy information. Compared to techniques that operate the entirety of the NVM in the higher-level redundancy modes having relatively less error protection, techniques described herein provide better error recovery. Compared to techniques that operate the entirety of the NVM in the higher-level redundancy modes having relatively more error protection, the techniques described herein provide reduced redundancy information overhead.
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