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Solid-state disk storage device and data access method of solid-state disk storage device

A storage device and data storage technology, applied in the information field, can solve the problems of high complexity of ECC logic implementation, uneven service life of NandFlash, and complicated software management algorithm.

Active Publication Date: 2016-07-27
HUAWEI TECH CO LTD
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Problems solved by technology

People have proposed a method of compressing data before writing it into NandFlash to reduce the amount of data actually written, but the existing technology requires the error checking and correction (ECC, Error Checking and Correcting) logic of the SSD controller to support multiple code rates, It makes the complexity of ECC logic implementation high, complicates the software management algorithm, and also makes the service life of different physical pages in a physical block of NandFlash unbalanced

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0049] In the prior art, a fixed number of sector data and corresponding ECC error correction codes are stored in one NandFlash physical page. The compression engine compresses each original data block. When the original data block can be compressed below a certain threshold, the compression engine notifies the data selector to select the compressed data and store it in the physical page of NandFlash. A fixed number of sector data is stored in the physical...

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Abstract

The invention provides a solid-state disk (SSD) storage device and a data access method of the SSD storage device. The problems existing in the prior art that the data management of an SDD is high in complexity, and NandFlash physical pages in a NandFlash physical block are inconsistent in the service life are solved. According to the invention, the user data area, first order metadata and the length of an ECC in each storage cell of the SSD storage device are set to be fixed values, the format of data stored in each storage cell is fixed, the ECC can guarantee the consistency of data in the user data area and the first order metadata according to a fixed code rate, the correctness and integrity of the data in the user data area and the first order metadata are guaranteed, data management is simplified, and the ECC hardware logic complexity is reduced; at the same time, because the ECC code rate is consistent, the consistency of the service life of each storage cell is guaranteed.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a solid-state hard disk storage device and a data access method for the solid-state hard disk storage device. Background technique [0002] With the large-scale development of information technology, Solid-State Disk (SSD, Solid-State Disk) emerges as the times require. SSDs using Flash media have high performance and low power consumption, which can greatly reduce the latency of storage systems, and because SSDs do not require mechanical structures, their reliability will be higher. [0003] NandFlash, as an SSD storage medium, has a certain lifespan limit for its erasing and writing times, which becomes a key factor affecting the lifespan and performance of SSDs. In NandFlash, data is organized in the form of NandFlash physical blocks and NandFlash physical pages, and a NandFlash physical block consists of several NandFlash physical pages. A NandFlash physical block is t...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F12/06
CPCG06F3/06G06F3/0608G06F3/064G06F3/0644G06F3/0679G06F3/0619G06F3/0688G06F3/0655G06F11/1068G06F21/602G06F21/64G11C29/52
Inventor 周冠锋
Owner HUAWEI TECH CO LTD
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