With the rapid development of computers, people developed video processing core cards, which made it possible to digitize analog video. In this way, the first video capture card was born. This is what I call a PC-type hard disk recorder. The small security guards at the bank were finally happy because the use of large-capacity hard disks completely liberated them from the pain of changing tapes throughout the day. However, based on the application of the Windows system monitoring program, and not to say that the software itself is stable, for Windows itself, want to make it not work 24 hours, without a crash for months, may not even Gates himself will not believe , so annoying things have emerged, PC-type hard disk video recorders either crashed all day, or a little virus at every turn. Our security comrades are crazy again...
The Chief of the Banking Security Department could not resist anymore. He raised a call and said to our technical director: "What broken products you have developed, you have been dead all day, you still don't want the money..." In pain, we The director swears in his heart: "The TMD can't use the Windows platform anymore!"
Six months later, our DVR based on the Linux platform finally emerged, no virus, no disk fragmentation, the system was stable for some time. The chief of the security department had no time to come and wanted to get a video file to go home. Because of the limited education level, it was very difficult to use Linux, and found that the file was not able to be played on his computer at all, so he filed a call and told our director again. The director was desperation to start plotting the next generation of video products...
Nowadays, the development and maturity of science and technology is far greater than people's imagination. Manufacturers of PC hardware have spotted the field of security monitoring, and have produced PC hardware specifically for security monitoring. I will not talk about the difference between them and general PC hardware. I will just give an example of the difference between an ordinary hard disk and a DVR dedicated hard disk:
The DVR dedicated hard drive is designed to meet the storage requirements of digital hard disk video recorders for system data and digital image information. The design of an ordinary PC hard disk is based on 8×5. 8×5 refers to an ordinary PC hard disk working for 8 hours a day, working 5 days a week (hard disk work means that the hard disk is in a read-write state. Need special attention is the hard disk has two states after power up: working state and waiting state Among them, the working state is the hard disk for reading and writing. The waiting state is that the hard disk has not been read or written but is in standby state.) The DVR dedicated hard disk is designed and developed according to the 24 x 7 enterprise-level environment requirements. 24 × 7 is to work 24 hours a day, work 7 days a week (that is, continuous work). Therefore, ordinary PC hard disks are not suitable for continuous reading and writing over a long period of time. If regular PC hard disks are required to be read and written for a long time, they will greatly damage the hard disk, causing the hard disk to have abnormal sounds, read/write errors, and work interruptions. Causes the hard disk to eventually become damaged. Digital hard disk recorders are constantly running all year round. Therefore, it is required that the hard disk must be able to work continuously for a long time. The DVR dedicated hard disk can meet this requirement.
The questions below should be noted when assembling PC-type hard disk recorders. First affirm that I am not teaching everyone how to install the machine, but how to improve the overall machine stability and longer life through some details.
At the beginning of the installation, the CPU was installed. The simple steps seem simple. In fact, the most important place is the application of grease. Everyone thinks that once the machine is put into operation, it is 7×24 hours of operation. If it is in a professional server room, the smart air conditioner can control the temperature at any time. I will say nonsense, but most machines do not have this treatment. In the general environment, the CPU temperature is quite amazing, if not the above fan radiator CPU used to omelette is not a problem, the silicone grease at this time has an important role, when coating must pay attention, To be even but not too thick, too thick when the pressure on the silicone grease will overflow, if some of the flow into the CPU slot is unthinkable, but it can not be painted too thin, too thin CPU and fan heat sink There will be a certain gap between them, not conducive to heat dissipation. I think a lot of people wear silicone grease when they are loading CUP, or they just don't paint it. This is because if the CPU temperature is too high and it causes a crash, you must regret it at the time. .
Next, talk about hard disk installation. There is a large fan in front of the hard disk. This fan is crucial to the heat dissipation of the hard disk. Now the hard drive is very large, the general installation is a T, fast speed, high heat dissipation. Many times when equipped with a computer is equipped with a large hard drive, but the location of the hard disk slot there are still many. Faced with such a large number of locations, many people simply select a location when they are installed, causing the hard disk to be located at the center of the fan. If the hard disk temperature is too high, the reading and writing speed will be slow, and sometimes it will cause the quality of the video to deteriorate. That is, the fixed screw, the standard is 4 points, in fact, in order to stabilize the stability of the hard drive 8 screws is not an exaggeration, once and for all.
Questions about the capture card. When the acquisition card is installed, it is usually installed one slot at a time. This facilitates heat dissipation and facilitates disassembly and assembly. After the acquisition card is installed, it is necessary to mark the following interface. This is a collection card of several channels. This is to facilitate the installation of the cassette. The installation of the riffraff must not be mistaken. For example, many people installed a capture card to test the capture card. They simply took a tamper and plugged in. Then they found that some ports were useless. At this time, he considered that the DAQ card was bad. In actual fact, if you use a 4-way dice to plug in an 8-channel capture card, this can lead to situations where the port cannot be identified, so this should be taken care of.
The Chief of the Banking Security Department could not resist anymore. He raised a call and said to our technical director: "What broken products you have developed, you have been dead all day, you still don't want the money..." In pain, we The director swears in his heart: "The TMD can't use the Windows platform anymore!"
Six months later, our DVR based on the Linux platform finally emerged, no virus, no disk fragmentation, the system was stable for some time. The chief of the security department had no time to come and wanted to get a video file to go home. Because of the limited education level, it was very difficult to use Linux, and found that the file was not able to be played on his computer at all, so he filed a call and told our director again. The director was desperation to start plotting the next generation of video products...
Nowadays, the development and maturity of science and technology is far greater than people's imagination. Manufacturers of PC hardware have spotted the field of security monitoring, and have produced PC hardware specifically for security monitoring. I will not talk about the difference between them and general PC hardware. I will just give an example of the difference between an ordinary hard disk and a DVR dedicated hard disk:
The DVR dedicated hard drive is designed to meet the storage requirements of digital hard disk video recorders for system data and digital image information. The design of an ordinary PC hard disk is based on 8×5. 8×5 refers to an ordinary PC hard disk working for 8 hours a day, working 5 days a week (hard disk work means that the hard disk is in a read-write state. Need special attention is the hard disk has two states after power up: working state and waiting state Among them, the working state is the hard disk for reading and writing. The waiting state is that the hard disk has not been read or written but is in standby state.) The DVR dedicated hard disk is designed and developed according to the 24 x 7 enterprise-level environment requirements. 24 × 7 is to work 24 hours a day, work 7 days a week (that is, continuous work). Therefore, ordinary PC hard disks are not suitable for continuous reading and writing over a long period of time. If regular PC hard disks are required to be read and written for a long time, they will greatly damage the hard disk, causing the hard disk to have abnormal sounds, read/write errors, and work interruptions. Causes the hard disk to eventually become damaged. Digital hard disk recorders are constantly running all year round. Therefore, it is required that the hard disk must be able to work continuously for a long time. The DVR dedicated hard disk can meet this requirement.
The questions below should be noted when assembling PC-type hard disk recorders. First affirm that I am not teaching everyone how to install the machine, but how to improve the overall machine stability and longer life through some details.
At the beginning of the installation, the CPU was installed. The simple steps seem simple. In fact, the most important place is the application of grease. Everyone thinks that once the machine is put into operation, it is 7×24 hours of operation. If it is in a professional server room, the smart air conditioner can control the temperature at any time. I will say nonsense, but most machines do not have this treatment. In the general environment, the CPU temperature is quite amazing, if not the above fan radiator CPU used to omelette is not a problem, the silicone grease at this time has an important role, when coating must pay attention, To be even but not too thick, too thick when the pressure on the silicone grease will overflow, if some of the flow into the CPU slot is unthinkable, but it can not be painted too thin, too thin CPU and fan heat sink There will be a certain gap between them, not conducive to heat dissipation. I think a lot of people wear silicone grease when they are loading CUP, or they just don't paint it. This is because if the CPU temperature is too high and it causes a crash, you must regret it at the time. .
Next, talk about hard disk installation. There is a large fan in front of the hard disk. This fan is crucial to the heat dissipation of the hard disk. Now the hard drive is very large, the general installation is a T, fast speed, high heat dissipation. Many times when equipped with a computer is equipped with a large hard drive, but the location of the hard disk slot there are still many. Faced with such a large number of locations, many people simply select a location when they are installed, causing the hard disk to be located at the center of the fan. If the hard disk temperature is too high, the reading and writing speed will be slow, and sometimes it will cause the quality of the video to deteriorate. That is, the fixed screw, the standard is 4 points, in fact, in order to stabilize the stability of the hard drive 8 screws is not an exaggeration, once and for all.
Questions about the capture card. When the acquisition card is installed, it is usually installed one slot at a time. This facilitates heat dissipation and facilitates disassembly and assembly. After the acquisition card is installed, it is necessary to mark the following interface. This is a collection card of several channels. This is to facilitate the installation of the cassette. The installation of the riffraff must not be mistaken. For example, many people installed a capture card to test the capture card. They simply took a tamper and plugged in. Then they found that some ports were useless. At this time, he considered that the DAQ card was bad. In actual fact, if you use a 4-way dice to plug in an 8-channel capture card, this can lead to situations where the port cannot be identified, so this should be taken care of.
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