公开(公告)号：US20190121551A1

公开(公告)日：2019-04-25

申请号：US15859060

申请日：2017-12-29

Applicant: Apacer Technology Inc.

Inventor： Jiunn-Chang LEE ,  Yin-Chuan LIAO

IPC: G06F3/06

CPC classification number: G06F3/0616 ,  G06F3/064 ,  G06F3/0661 ,  G06F3/0679 ,  G11C16/14 ,  G11C16/16 ,  G11C16/3445 ,  G11C16/3495 ,  G11C17/14 ,  G11C2211/5641 ,  G11C2211/5644 ,  G11C2216/26

Abstract: The present disclosure illustrates a method of extending a lifetime of a solid state disk (SSD). The SSD includes a flash memory which is a multi-level cell (MLC) flash memory. The method includes steps of: setting a number of logic blocks of the SSD to be one-half of a number of physical blocks of the flash memory; reading, by a control unit of the SSD, a write/erase times of each of the physical blocks of the flash memory; and converting the physical block, of which a number of the write/erase times exceeds an upper limit of the write/erase times, from a multi-level storage format to a single-level storage format. A number of the logic blocks is a constant value.