Shulou(Shulou.com)11/24 Report--

With the continuous development of urban traffic, the original vehicle products such as driving recorder, GPS vehicle terminal and vehicle entertainment system continue to evolve. People are no longer satisfied with the functions of vehicle driving information collection, positioning data collection, picture capture and so on, but also need to record video images in real time through monitoring to facilitate the restoration of the scene afterwards. At the same time, the accurate acquisition of various operating signals of the vehicle can also provide reliable data sources for driving behavior, full load, vehicle running status and so on, so the importance of on-board monitoring is becoming increasingly prominent.

Among them, as the core component of carrying data storage and transmission, vehicle storage hard disk is becoming more and more important in the development of vehicle monitoring market. In the face of new challenges and opportunities brought by automotive electronics and rail transit to the storage market, Baiwei launched a full range of on-board storage products, including SSD, BGA SSD, DDR, UFS, Micro SD card and so on.

This issue will focus on Baiwei's in-vehicle storage hard disk solution for data writing intensive applications such as in-vehicle surveillance video equipment and rail transit safety driving monitoring equipment, and deeply explore the pain points faced by the current industry. share the characteristics of in-vehicle monitoring and storage applications from multiple dimensions.

Pain point one

Capacity emergency? How to solve the problem of massive data storage

Nowadays, the development process of the car is just like the mobile phone, the function of the car body is becoming more and more complex, and the amount of data generated by the car is also increasing. On the one hand, cars are equipped with more and more sensors and cameras, constantly collect and record the surrounding environment, vehicle status and other data and continue to store and record, and the storage time is getting longer and longer. local data usually need to be saved for a month or more. On the other hand, the emergence of functions such as vehicle black boxes also expands the storage requirements of automobile monitoring applications. These functions are also constantly recording and transmitting data, so it is necessary to adopt larger storage devices and more efficient storage management solutions.

In order to solve the capacity problem under the massive data, taking Baiwei C1008 2.5 "SATA SSD as an example, the product can provide a variety of capacity choices of 500GB, 960GB, 1.92TB and 3.84TB, which meets the mass storage requirements of the vehicle monitoring system. Multiple capacity choices also mean better matching to meet the needs of different types of on-board applications. At present, C1008 has been widely used in vehicle DVR, security video surveillance, rail transit and other fields. In the case of further improvement of automobile intelligence in the future, even if more cameras are connected, the storage capacity of 3.84TB can fully meet the needs of users.

In addition, the Baiwei C1008 series adopts SATA II interface specification and is compatible with serial ATA disk drives, which makes the product highly compatible with the vehicle monitoring system, which can not only provide stable data writing performance for a long time, but also ensure the stable transmission of vehicle surveillance video information.

Pain point two

Multi-route, long-time monitoring, how to ensure storage stability

The situation of video interruption, stop recording and frame loss encountered in vehicle surveillance is undoubtedly one of the most troublesome problems for users. Under the continuous writing of multi-route, long-time and high-definition video data, it is very important to ensure the integrity and reliability of data recording, which makes high stability requirements for storage devices.

Take Baiwei C1008 as an example, in 50 rounds of full video recording tests with 12 cameras, the product video data is continuously written stably, and there are no frames lost throughout the process. In addition, Baiwei C1008 carries out multiple firmware optimization in the garbage collection mechanism and adopts a self-developed dynamic load balancing algorithm, which will first sort out and optimize the scattered space within the Flash without writing or reading, and there will be additional blank blocks as a buffer, which makes garbage collection and HOST writing parallel, effectively ensuring the stability of continuous data writing. The durability and efficiency of SSD are fully improved.

By simulating the application scenario of writing multiple video files concurrently after full recording of user video files, C1008 is tested by FIO random write after full HD Tune, and the random write speed of the product (3.84TB) is basically maintained at 6000 IOPS, and does not drop to 0, fully ensuring that in the case of multiple rounds of video file input, it can also stably capture smooth HD video without losing frames.

Pain point three

Read and write frequently, how to ensure the reliability and life of the product

"frequent + long time reading and writing" is undoubtedly a major killer of SSD. In order to ensure the quality of the vehicle storage hard disk, the core component flash memory particles play a key role, high-quality flash memory particles can ensure the stability, reliability and durability of the storage hard disk. Compared to the ordinary storage hardware on the market, the Baiwei C1008 carried out rigorous particle screening at the beginning of its design, using 3D TLC NAND Flash particles and writing / erasing times (P / E Cycle) up to 3000 times.

On the other hand, people can monitor and manage the service life of the vehicle storage hard disk through a series of technical means to ensure the reliable storage of data and the normal operation of the system. For example, the Baiwei C1008 has a built-in balanced wear mechanism, which can write data evenly into each block of the Flash device, avoiding excessive erasure times in a single block, resulting in product damage or data loss. The product also comes with S.M.A.R.T. Instructions, can obtain hard disk status information and predict potential hard disk failures, and support online firmware upgrade, further improving the reliability and life of the hard disk.

With stringent particle screening, testing, excellent master control and customized firmware development capabilities, Baiwei C1008 products are more robust and durable, supporting stable work in extreme environments. After rigorous and precise testing, Baiwei C1008's MTBF (average fault-free time) exceeds 1500000 hours, ensuring the stability and reliability of data storage.

Pain point four

How to solve the problem of abnormal power loss and how to make a good "insurance"

The driving environment is changeable, which leads to the vehicle storage is often in complex and harsh operating conditions, and the power supply occasionally encounters failure or failure, which will cause abnormal power loss, which can easily lead to data loss, or even the failure of the whole solid state hard disk. Therefore, the power-off protection of vehicle storage is more necessary than other devices. The current SSD design itself has a power-off protection mechanism, but the main focus is on the algorithm level, that is, through the firmware algorithm to achieve power-off protection, although this way can protect data security to a certain extent, but in the face of some extreme conditions, this protection mechanism is still uncertain.

In order to solve this problem, Baiwei C1008 adopts the double power-off protection scheme of "firmware algorithm + tantalum capacitor" to ensure that the power outage at any time will not cause data loss, firmware loss and other problems. The built-in power detection chip of the product monitors the power supply in real time, and immediately enables the power-off protection module in case of abnormal power outage. it uses the power stored by tantalum capacitor to provide continuous power supply for SSD in the case of abnormal power loss, and stores dynamic data in flash memory to ensure the safety of firmware programs, thus ensuring that power outages at any time will not cause data loss, firmware loss and other problems.

At the same time, the Baiwei C1008 can adapt to the voltage fluctuation which is higher than the traditional 5V (±5%) in the complex power supply environment through the tests of power compatibility, dynamic response ability of power conversion and stability of different input voltages.

Pain point five

How to deal with extreme environments such as strong earthquakes and high temperatures

Due to the uncertainty of the vehicle driving environment, it is often faced with the influence of adverse environmental factors, such as large vibration, large temperature change, dust, strong interference and so on. In order to work continuously for a long time, this puts forward higher requirements for the durability, durability and heat dissipation of the vehicle monitoring memory.

The Baiwei C1008 adopts a strong design and carries out glue reinforcement from the chip level. the product has passed the impact test of 1500G and the vibration test of the highest 2000Hz frequency, with an anti-seismic grade of 6g, preventing the chip from loosening or virtual welding in high vibration and strong impact applications.

In terms of working temperature, the Baiwei C1008 supports a working temperature of-20 ℃ ~ 70 ℃. Under the extreme temperature caused by thermal expansion and cold shrinkage changes, internal electrical changes and physical characteristics changes, the product still ensures a stable and reliable high performance.

Summary

On the whole, relying on Baiwei's ability to develop its own firmware algorithm and advanced closed test and manufacturing technology, the C1008 series SSD has technical advantages such as large capacity, stable read and write, high erase and write life, power-off protection, strong design and other technical advantages, supporting data writing-intensive vehicle applications to work stably for a long time, typically used in security monitoring, rail transit, vehicle DVR and other fields.

In the face of the new challenges and opportunities brought by automotive electronics and rail transit to the storage market, Baiwei has carried out a comprehensive layout of a series of products from on-board SSD to specification-level eMMC, LPDDR, UFS and so on, continuously introducing storage products with higher reliability, higher stability and greater security, providing a variety of choices for on-board applications. In the future, Baiwei will actively lay out and develop closed test integration 2.0, and continue to customize industry-level storage solutions for subdivided applications to meet customers'"thousand-end and thousand-face" storage needs.

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