Flash Reliability in Production: The Expected and the Unexpected | USENIX

As solid state drives based on flash technology are becoming a staple for persistent data storage in data centers, it is important to understand their reliability characteristics. While there is a large body of work based on experiments with individual flash chips in a controlled lab environment under synthetic workloads, there is a dearth of information on their behavior in the field. This paper

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ssd age. Note: 50~34nm process & custom firmware.

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“We see no evidence that higher-end SLC drives are more reliable than MLC drives within typical drive lifetimes.”