Storage device and read reclaim method thereof

    公开(公告)号:US10310924B2

    公开(公告)日:2019-06-04

    申请号:US15376227

    申请日:2016-12-12

    摘要: A read reclaim method of a storage device includes detecting, at a cycle of a random number of read operations, the number of error bits within non-selection data stored in each of a plurality of memory blocks. A memory block having the number of detected error bits, with respect to the number of read operations, increasing at a rate greater than a reference rate over one or more cycles of the random number of read operations is selected as a weak block. The number of error bits within non-selection data stored in the weak block is detected at a cycle of a fixed number of read operations. A detection is made of whether the number of error bits detected according to the fixed-number cycle is greater than or equal to a read reclaim reference. The non-selection data is data not requested by a host.

    OPERATION METHOD OF NONVOLATILE MEMORY SYSTEM
    24.
    发明申请
    OPERATION METHOD OF NONVOLATILE MEMORY SYSTEM 有权
    非易失性存储器系统的操作方法

    公开(公告)号:US20160203047A1

    公开(公告)日:2016-07-14

    申请号:US14979971

    申请日:2015-12-28

    IPC分类号: G06F11/10 G11C29/52 G06F3/06

    摘要: A nonvolatile memory system includes a nonvolatile memory device and a memory controller managing the nonvolatile memory device. The operation method includes receiving a read command and a read address from an external device, reading read data stored in memory cells connected to a selected word line of a selected memory block corresponding to the read address in response to the read command, and detecting and correcting error bits of the read data. The method includes estimating the number of error bits of unselected word lines on the basis of erase leaving times of memory cells connected to the unselected word lines of the selected memory block and the detected error bits, and performing read-reclaim operation on at least one word line among the selected word line and the unselected word lines on the basis of the estimated number of error bits.

    摘要翻译: 非易失性存储器系统包括非易失性存储器件和管理非易失性存储器件的存储器控​​制器。 操作方法包括从外部设备接收读取命令和读取地址,响应于读取命令,读取存储在连接到与所读取的地址对应的所选择的存储器块的选定字线上的存储器单元中的读取数据, 纠正读取数据的错误位。 该方法包括:基于连接到所选择的存储器块的未选择字线的存储器单元的擦除离开时间和检测到的错误位,来估计未选择字线的错误位的数量,以及至少一个执行读取回收操作 基于所估计的错误比特数,所选字线和未选字线之间的字线。