The difference between a normal PC hard disk and a DVR dedicated hard disk

It is understood that about 60% of the problems with the embedded hard disk recorder (DVR) come from the hard disk. The problem of the hard disk is very serious. Every time the hard disk goes wrong, the engineering company must provide on-site service. Obviously, the on-site service will bring about an increase in service costs. At the same time, the engineering company is also a loss of brand image.

For the engineering company, when you install a hard disk with fewer problems, your profits will increase, your service costs will be reduced, and your work will make your customers more assured. Engineering companies no longer have to worry about frequent door-to-door service due to problems with hard drives, resulting in a sharp increase in service costs and even a loss in the entire project.

For the end user, if the hard disk failure is less, the risk of data loss is reduced, the system is more secure, and the monitoring system really plays its due role.

The following is not the home desktop or notebook hard drive we use, but the DVR dedicated hard drive. They mainly provide high-reliability and customized performance mass storage products for DVR system users in the security and defense industry or special users who need to run continuously, making it easier for users to store and manage their own surveillance videos, TV programs, videos, Photos and documents, etc.

Although these DVR-specific hard disks are no different in appearance from ordinary PC hard disks, DVR-specific hard disks are more suitable for professional use in terms of functions and parameters. The differences are as follows:

First, the applicable environment

Ordinary PC hard drive

Ordinary PC drives are designed to meet the evolving trend of PC applications—more reliable system data storage, versatile application support, and faster storage response times.

The more reliable system data storage means that under a hard disk (including array) system, the hard disk system can ensure reliable and secure storage of various system data. Diverse application support means that the hard drive can support multiple application environments: PC desktop applications, multimedia applications and games.

DVR dedicated hard drive

The DVR dedicated hard drive is designed to meet the storage requirements of digital hard disk recorders for system data and digital image information.

The DVR dedicated hard drive is extremely stable with reliable support for system data. This is related to the system characteristics of digital DVRs. The system of PC-type digital hard disk recorders is quite simple (there is no possibility of multiple systems coexisting), and the applications supported in the system are specially customized for digital hard disk recorders (there are no multiple applications). The coexistence situation); embedded digital hard disk recorders generally do not have the concept of a system, the system is built-in, and has nothing to do with the hard disk.

The DVR dedicated hard disk satisfies the digital hard disk recorder's file image for digital image storage and playback, and optimizes the hard disk for the digital hard disk recorder's input and playback features to fully support streaming media support.

Second, the specific difference

Hard disk life

Ordinary hard disks will start at full speed when the power is turned on, and the instantaneous current may reach 2 amps or even higher. When the monitoring hard disk is started, it will accelerate slowly, and the starting current will be controlled below 2 amps. Because the monitoring system usually installs multiple hard disks, it will generate a large starting current at the moment of startup. If it is an ordinary hard disk, the power supply will be unbearable or even burned.

In addition, the monitoring system's transmission speed requirements for the hard disk are generally not high, but there will be frequent reading and writing of small data volumes. Therefore, it is necessary to make a structural optimization design for the read/write characteristics of the monitoring system on the head reading and writing mechanism to extend the life of the magnetic head. The theoretical average trouble-free running time of the monitoring hard disk is much longer than that of the ordinary hard disk, and the stability and reliability are higher.

Continuous working time difference

The design of a normal PC hard disk is based on 8×5. 8×5 refers to the ordinary PC hard disk working 8 hours a day, 5 days a week (hard disk work means the hard disk is in the read and write state. It is necessary to pay special attention to the two states after the hard disk is powered: working state and waiting state The working state is that the hard disk performs reading and writing work, and the waiting state is that the hard disk is not reading and writing but is in a standby state.

DVR-specific hard drives are designed and developed to meet 24x7 enterprise-class environmental requirements. 24×7 is working 24 hours a day, 7 days a week (that is, continuous work). Therefore, the ordinary PC hard disk is not suitable for continuous reading and writing for a long time. If the ordinary PC hard disk is required to be read and written for a long time, the hard disk will be greatly damaged, and the hard disk may have abnormal sounds, read and write errors, work stoppage, etc. Causes the final damage to the hard drive.

Digital DVRs are running all the year round, so the hard disk must be able to work continuously for a long time. The DVR dedicated hard disk can meet this requirement.

Startup difference

All 3.5-inch hard drives contain a motor system, so when the hard drive is powered up, it is similar to the case where the motor is powered up: a large startup current will occur at the initial time of power-up to complete the hard drive. If the external power supply system of the hard disk does not guarantee sufficient current support when the power is turned on, the hard disk will fail to boot, resulting in the hard disk being unavailable. And if this happens multiple times, it is easy to cause damage to the hard disk. Since the power supply of the hard disk motor is satisfied by the external power supply system DC 12V, the DC current of 12V is used as the standard when evaluating the starting current of the hard disk. The startup current of a normal PC hard disk is generally between 2.8A and 3.2A. The DVR dedicated hard drive has a startup current of up to 2.0A.

Digital hard disk recorders often use multiple hard disks for data storage. For example, an 8-chip hard disk is installed. The normal PC hard disk startup current is 2.8×8=22.4A, and the lowest power consumption is 22.4A×12V=268.8W. DVR dedicated hard drive starting current 2.0A × 8 = 16A, the highest power consumption is 16A × 12V = 192W. It can be seen that the DVR dedicated hard disk has lower requirements on the external power system in the same number of hard disks (the number of DVR dedicated hard disks that can be installed is more under the support of the external power supply of the same output power).

Note: In the above case, if the external power supply system can only guarantee 250W, some hard disks can be recognized when using ordinary PC hard disks, some hard disks can not be recognized, and there is no regularity.

Operating power consumption and heat dissipation difference

The power consumption here refers to the power consumption of the hard disk during normal read and write states. The operating power consumption of a normal PC hard disk is generally about 14.5 watts, and the operating power consumption of a DVR dedicated hard disk is generally about 8 watts. It can be seen that the DVR dedicated hard disk runs at a power consumption of only 55% of that of a normal PC hard disk. Low operating power consumption is not only important for the power system, but also important for the heat dissipation of the digital DVR system.

About 75% of the power consumption will be converted into heat).

In a digital hard disk recorder, if 8 hard disks are installed, the total power consumption of the ordinary PC hard disk is 14.5W×8=116W, and the total power consumption of the DVR dedicated hard disk is 8W×8=64W. If you use a normal PC hard disk, you can imagine that there is such a high heat source in such a small space as the digital video recorder. The heat dissipation requirement for the system is very high. In order to ensure that the hard disk has a reasonable ambient temperature (0 to 60 ° C), The hard disk system must be effectively cooled. With the DVR dedicated hard disk, the heating situation is much better----the system cooling requirements are reduced to make the system more adaptable to the environment.

Transmission difference

In addition to the transmission mode of the traditional PC hard disk, the DVR dedicated hard disk also introduces an updated transmission mode---uninterrupted transmission mode, which is up to 65MB/s. By introducing an uninterrupted transmission mode, the support of the hard disk to the streaming media is more reliable, and the smoothness and stability of the playback of the digital hard disk recorder while being recorded are fully guaranteed. This is a feature that is not available on other hard drives.

Third, a comprehensive description

In summary, the difference between a normal PC hard disk and a DVR dedicated hard disk is that the DVR dedicated hard disk fully takes into account the requirements of the digital hard disk recorder for the storage system, and further improves the application of the DVR dedicated hard disk to the digital hard disk recorder by analyzing these requirements. Sexuality has fundamentally solved the storage problem of digital hard disk recorders, and has brought the reliability and stability of digital hard disk recorders to a new level.

Stable above all, DVR dedicated hard drive provides the most stable and secure data storage medium, reduces the cost of engineering services, and reduces the risk of end user data loss. It is the most loyal partner of the monitoring system industry.