Redundant data storage schemes for multi-die memory systems

摘要

A method for data storage includes storing data in a memory that includes one or more memory units, each memory unit including memory blocks. The stored data is compacted by copying at least a portion of the data from a first memory block to a second memory block, and subsequently erasing the first memory block. Upon detecting a failure in the second memory block after copying the portion of the data and before erasure of the first memory block, the portion of the data is recovered by reading the portion from the first memory block.

主权项

1. An apparatus, comprising:
a first memory device including a first plurality of blocks; a second memory device including a second plurality of blocks; and a controller configured to:
select a first subset of blocks of the first plurality of blocks;copy first data stored in each block of the first subset of blocks to a respective block of the second plurality of blocks;erase the first data stored in each block of a first portion of the first subset of blocks; anddelay erasure of the first data stored in each block of a second portion of the first subset of blocks for a predetermined period of time.