Solid state disk reading error detecting device and method for detecting reasons for reading errors incapable of being corrected

A technology of solid-state hard disk and detection device, which is applied in the direction of error detection/correction, redundant code error detection, and response error generation. It can solve problems such as electron entry, particle wear, and escape, so as to maximize service life and improve The effect of service life

Active Publication Date: 2017-05-31
HUNAN GOKE MICROELECTRONICS
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Problems solved by technology

[0003] 1) Data Retention: Data retention, the data on NAND Flash is determined by the number of electrons stored in the floating gate of each storage unit, but the electrons in the floating gate will escape; the longer the time, the higher the temperature , The greater the erasing times of the block, the more electrons escape from the floating gate, and the weaker the data retention ability of NAND Flash, which will eventually lead to data errors;
[0004] 2) Read Disturb: Read Disturb, due to the physical structure of the NAND Flash Block, when reading a FlashPage in the Block, it is necessary to apply a forward conduction voltage to other Flash Pages; although the conduction voltage is lower than the programming vo

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  • Solid state disk reading error detecting device and method for detecting reasons for reading errors incapable of being corrected
  • Solid state disk reading error detecting device and method for detecting reasons for reading errors incapable of being corrected
  • Solid state disk reading error detecting device and method for detecting reasons for reading errors incapable of being corrected

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Embodiment Construction

[0041] Such as figure 1 , the system modules involved in the present invention include:

[0042] HOST: The host, the user of the SSD, is connected to the disk through the SATA or PCIE interface, and sends data commands such as reading and writing and other management commands to the disk;

[0043] SSD: solid state drive, mainly composed of SSD controller and storage medium NAND Flash;

[0044] Controller: SSD controller, the bridge between the host and NAND Flash, is responsible for scheduling, executing host commands and converting them into NAND Flash read and write commands; in addition, the controller is also responsible for NAND Flash garbage collection, inspection, equalization, etc. NAND Flash Management algorithm and read, write, erase error exception handling;

[0045] NAND Flash: the storage medium of solid-state hard disk, which has the characteristics of non-volatile and high storage density;

[0046] CPU: the control and management unit inside the controller, r...

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Abstract

The invention discloses a solid state disk reading error detecting device and a method for detecting reasons for reading errors incapable of being corrected. Different treatment strategies are selected according to different reasons for the reading errors incapable of being corrected, therefore, it is guaranteed that the service life of Flash Page is longest, and the service life of SSD is prolonged.

Description

technical field [0001] The invention relates to the detection of SSD solid-state hard disks, in particular to a solid-state hard disk, a read error detection device and a detection method for the cause of read uncorrectable errors. Background technique [0002] First, two basic characteristics related to NAND Flash read data errors are introduced: [0003] 1) Data Retention: Data retention, the data on NAND Flash is determined by the number of electrons stored in the floating gate of each storage unit, but the electrons in the floating gate will escape; the longer the time, the higher the temperature , The greater the erasing times of the block, the more electrons escape from the floating gate, and the weaker the data retention ability of NAND Flash, which will eventually lead to data errors; [0004] 2) Read Disturb: Read Disturb, due to the physical structure of the NAND Flash Block, when reading a FlashPage in the Block, it is necessary to apply a forward conduction volt...

Claims

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Application Information

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IPC IPC(8): G06F11/10
CPCG06F11/1068
Inventor 陈意李雷杨万云周士兵彭鹏马翼田达海
Owner HUNAN GOKE MICROELECTRONICS
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