公开(公告)号：EP2880533A1

公开(公告)日：2015-06-10

申请号：EP13825514.6

申请日：2013-07-23

申请人： Seagate Technology LLC

发明人： CHEN, Zhengang ,  WU, Yunxiang

IPC分类号： G06F11/08 ,  G06F12/00

CPC分类号： G06F11/1068 ,  G06F11/1048 ,  G06F11/108 ,  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.