Invention Grant
- Patent Title: Method of optimizing solid state drive soft retry voltages
- Patent Title (中): 优化固态硬盘软重试电压的方法
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Application No.: US13856179Application Date: 2013-04-03
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Publication No.: US09025393B2Publication Date: 2015-05-05
- Inventor: Yunxiang Wu , Zhengang Chen , YingQuan Wu , Ning Chen
- Applicant: LSI Corporation
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Suiter Swantz pc llo
- Main IPC: G11C11/56
- IPC: G11C11/56 ; G11C29/42 ; G11C16/00 ; G11C29/02 ; G11C29/50

Abstract:
A method of optimizing solid state drive (SSD) soft retry voltages comprises limiting a number of voltage reads and properly spacing and determining the reference voltage at which each voltage is read based on desired Bit Error Rate (BER) and channel throughput. The method determines each reference voltage for a number of soft retry voltage reads based on a hard decision read. The spacing between each read reference voltage is constant since each SSD type requires a number of reads for an accurate presentation of soft retry voltages. The voltage distance between each successive read is limited to a multiple of the constant spacing while the multiple is based on success or failure of the first read. The method determines a limited number of reads, the constant spacing between reads, and a desired reference voltage for each read, thereby increasing valuable throughput of the channel and decreasing BER.
Public/Granted literature
- US20140286102A1 Method of Optimizing Solid State Drive Soft Retry Voltages Public/Granted day:2014-09-25
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