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SSD raid4 system

A technology of solid-state hard disk and flash disk, applied in the field of RAID4 system, can solve the problems of enhanced data redundancy, unreliable data, and inconvenient use in practice, and achieve the effect of improving data redundancy, avoiding writing bottlenecks, and reducing writing delay

Active Publication Date: 2016-02-24
RAMAXEL TECH SHENZHEN
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AI Technical Summary

Problems solved by technology

However, with the improvement of the manufacturing process, MLC's ability to resist read and write interference has become worse, and it is not reliable to rely solely on ECC to protect data. Therefore, some people have thought of applying RAID5 technology to solid-state storage hard disks to enhance data redundancy.
However, RAID5 turns one write into two reads and two writes, which will greatly reduce the lifespan of NAND Flash, so few enterprise-level solid-state storage hard drives directly apply RAID5 technology
[0004] In summary, the existing enterprise-level solid-state storage hard drives obviously have inconveniences and defects in actual use, so it is necessary to improve them

Method used

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] see figure 2 , the present invention provides a RAID4 system of a solid-state hard disk, and the solid-state hard disk in the present invention is preferably an enterprise-level solid-state hard disk. RAID4 system 100 among the present invention comprises at least one multilayer unit MLC flash disk 10 and at least one single-layer unit SLC flash disk 20, in this embodiment, preferably the quantity of MLC flash disk 10 is set as N, the SLC flash disk 20 The quantity is 1. In a specific application of an enterprise-level solid-state disk, the MLC flash disk 10 is used as a data disk for sto...

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Abstract

The invention is applicable to the technical field of a computer, and provides an RAID4 (redundant array of independent discs 4) system of a solid-state disc. The system comprises at least one multi-level cell MLC flash disc and at least one single-level cell SLC flash disc, wherein the MLC flash disc is used as a data disc for data storage, and the SLC flash disc is used as a verification disc for data verification. Therefore, the reliability of data in an enterprise-level solid-state storage hard disc can be improved, and the problem of the reading and writing bottleneck of the verification disc can be solved.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a RAID4 system of a solid state disk. Background technique [0002] NAND Flash has excellent read and write performance and is currently the mainstream solid-state hard drive storage medium, but it has some physical characteristics: 1) It needs to be erased before writing, the unit of data reading and writing is page, and the unit of erasing is block; 2) Erase The number of deletions is limited; 3) Interference during reading and writing may cause data errors; 4) Data storage has a time limit. NAND Flash is divided according to the storage unit, and the more common ones are SLC (SingleLevelCell, single-level unit) and MLC (MultiLevelCell, multi-level unit). SLC is characterized by long life, fast writing speed, and low power consumption. Currently, the P / E times of mainstream SLC are more than 10 times that of MLC, and the writing speed is about 4 times that of MLC. However, M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/10
Inventor 张雷
Owner RAMAXEL TECH SHENZHEN
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