What is the difference between a hard disk monitor and a computer monitor card

The essential difference between DVR and computer + card is:

The DVR is a special DVR motherboard for monitoring, relatively speaking, the professional one is a little better than the computer + card!

As for the quality of the video, there are two things:

The second is the choice of camera, to see clearly, you have to choose a better camera, as well as angle, distance and so on.

There are two kinds of DVR: one is industrial-controlled, low-grade is the function of computer plus ** capture card and software to complete monitoring, the disadvantage is poor stability, high-end is the special industrial motherboard, chassis plus capture card, software performance is relatively stable. The other is embedded, which is shaped like VCD, and the programs are solidified into it, which runs stably, and the disadvantage is that the scalability is poor and the software upgrade is difficult.

The continuous working time of the monitoring hard disk and the ordinary hard disk is different, the transmission mode is different, and the power start is different.

Ordinary PC hard drives are designed to work 8 hours a day, 5 days a week. Surveillance HDDs are designed and developed to meet the requirements of enterprise-class environments. Work 24 hours a day, 7 days a week, that is, work continuously.

Ordinary PC hard disks are not suitable for long-term continuous read and write.

In addition to the transmission mode of the traditional PC hard disk, the special hard disk for monitoring also introduces a newer transmission mode, uninterrupted transmission mode, through the introduction of uninterrupted transmission mode, the support of hard disk convection** is more reliable, and fully guarantees the smoothness and stability of the digital hard disk recorder playback while recording, which is a feature that other ordinary hard disks do not have.

The power supply of the hard disk motor is met by the external power supply system DC 12V, so the DC current of 12V is used as the standard when evaluating the starting current of the hard disk. Digital hard disk recorders often use multiple hard disks for data storage, and monitoring hard disks with the same number of hard disks has lower requirements for the external power supply system.

Advantages of Surveillance Hard Drives:

The Surveillance HDD can support logger recording and playback very smoothly, optimizing the storage and reading and writing of streams**. And in terms of system data and mathematical image information, it is more stable than ordinary computer hard disks. The monitoring hard disk starts up slowly, and the current is controlled at about amperes.

The warranty for ordinary hard drives is a 2-year warranty, and the hard drives for security are covered by a 3-year limited warranty.

The biggest feature of monitoring is that it requires the hard disk to write continuously for a long time, but it does not have too high requirements for data reading. At this point, ordinary hard drives are not designed to meet the requirements at all. Ordinary hard disks are often read and written random small files in the home environment, and the pursuit of seek speed is fast, while the monitoring hard disk is suitable for continuous writing of large files and has good stability.

1. Continuous working hours.

Ordinary hard disks are not suitable for long-term continuous reading and writing, and long-term continuous reading and writing will cause a variety of problems, resulting in data loss. And the special hard disk for surveillance can work continuously for a long time.

2. Transmission mode.

In addition to the transmission mode of traditional hard disks, the special hard disk for surveillance also introduces an uninterrupted transmission mode. This is something that regular hard drives don't have.

3. Power management (power start).

The boot current of a normal hard disk is generally in between. The boot current of the dedicated hard disk for monitoring is up to.

4. Difference in operating power consumption and heat dissipation.

The operating power consumption of the special hard disk for monitoring is only 55% of the power consumption of ordinary PC hard disk. The dedicated hard disk for surveillance reduces the heat dissipation requirements of the system and makes the system more adaptable to the environmental leak key.

A computer hard disk (harddiskdrive, also known as a hard disk, Winchester hard disk) is a non-volatile memory based on a hard spinning platter.

The hard disk is the most important storage device of the computer, which is composed of the magnetic head, disc, motor, main control chip and other components. Its reading and writing method adopts semi-random access, which can read the data in the hard disk in any order, but the speed of reading the data in different locations is different.