Hybrid SSD with PCM

Author

Liu, Yining ; Zhou, Chuangshi ; Cheng, Xiaohua

Author_Institution

Netac Technol. Co., Ltd., Shenzhen, China

fYear

2011

fDate

7-9 Nov. 2011

Firstpage

1

Lastpage

5

Abstract

Solid-State Drive, popularly known as SSD is now widely used in computer system and industry. This is a new type of memory which is smaller and lighter as compared to HDD. During a “clean” shutdown, most host systems, initiate a command (the STANDBY IMMEDIATE command) to an SSD to give the SSD enough time to prepare for the shutdown. This allows the SSD to save data currently in transition (in temporary buffers) to the non-volatile NAND media. However, during an unsafe power shutdown, the SSD abruptly loses power before the host system can initiate the STANDBY IMMEDIATE command. This prevents data in the temporary buffers from being saved in the non-volatile NAND. In this paper, we advance two new hybrid SSD architectures which are composed of PCM and NAND Flash. In these architectures, data loss during unplanned power shutdown can be avoided.

Keywords

NAND circuits; flash memories; phase change memories; NAND flash memory; PCM; computer system; host system; hybrid SSD architectures; nonvolatile NAND media; phase-change memory; solid-state drive; temporary buffers; Cache memory; Flash memory; Flyback transformers; Nonvolatile memory; Phase change materials; Random access memory; Reliability; Hybrid; PCM; SSD; data loss; mapping information; power failure;

fLanguage

English

Publisher

ieee

Conference_Titel

Non-Volatile Memory Technology Symposium (NVMTS), 2011 11th Annual

Conference_Location

Shanghai

Print_ISBN

978-1-4577-1428-3

Type

conf

DOI

10.1109/NVMTS.2011.6137103

Filename

6137103