Name
Abstract | ||
|---|---|---|
Due to the increasingly significant process variation and gradual Flash memory cell wear-out, the worst-case-oriented error correction code (ECC) in solid-state drives (SSDs) is mostly underutilized throughout the entire lifetime. Error-prone overclocking of Flash memory chip I/O links can trade such ECC underutilization for opportunistically improving SSD speed performance, and its effectiveness strongly depends on how well the ECC decoding can handle the overclocking-induced I/O link errors. As SSDs are quickly adopting low-density parity-check (LDPC) code, this brief concerns LPDC-based overclocked SSDs. Experiments with 20-nm nand Flash memory chips reveal unique bit error characteristics of the overclocked I/O link, based upon which this brief develops solutions that can leverage the error characteristics to improve LDPC decoding performance. Results show that the developed techniques can reduce LDPC code decoding power consumption by 60% and reduce the decoding failure rate by over two orders of magnitude. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TCSII.2014.2350377 | IEEE Trans. on Circuits and Systems |
Keywords | Field | DocType |
process variation,solid-state drives,nand circuits,worst-case-oriented error correction code,bit error characteristics,error-prone overclocking,ldpc decoding performance,nand flash memory i/o link,ecc decoding,lpdc-based overclocked ssd,ecc underutilization,ssd speed performance,ldpc-based ssd,error correction codes,low-density parity-check code,size 20 nm,gradual flash memory cell wear-out,overclocking-induced i/o link errors,overclocking,parity check codes,low-density parity-check (ldpc) codes,decoding,flash memories,bit error rate,data transfer | Overclocking,Flash memory,Sequential decoding,Low-density parity-check code,Computer science,Input/output,Chip,Error detection and correction,Decoding methods,Computer hardware | Journal |
Volume | Issue | ISSN |
61 | 11 | 1549-7747 |
Citations | PageRank | References |
4 | 0.46 | 5 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kai Zhao | 1 | 115 | 6.20 |
| Jiangpeng Li | 2 | 55 | 5.29 |
| Jun Ma | 3 | 93 | 9.42 |
| Rino Micheloni | 4 | 69 | 12.85 |
| Tong Zhang | 5 | 1352 | 98.67 |