paper sharing

1 這是很好的conference喔
2 motivation: ECC要花點時間，他發現如果SSD是cache，好像可以不用每次都用那麼強的ECC (越強越慢)，因為就算要讀的page整個壞，也可以去下一層拿 (i.e., primary storage)
3 solution:  "有時候" 用 弱ECC




FlexECC: Partially Relaxing ECC of MLC SSD for Better Cache Performance
https://www.usenix.org/system/files/conference/atc14/atc14-paper-huang.pdf

Adaptive Paired Page Prebackup Scheme for MLC NAND Flash Memory

IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, VOL. 33, NO. 7, JULY 2014


problem: 有時寫 MSB page會弄壞 LSB page (同cell)
proposed: backup LSB page