It is understood that the embedded hard disk video recorder (DVR) of about 60% from the hard disk, the hard disk is a serious problem, every hard disk problems, the project has to on-site service, on-site service will obviously increase the cost of service, the engineering business is also a loss of brand image.
For the engineering business, when you install the hard disk out of the problem, your profit will increase, the cost of your service is reduced, the project you do more to allow customers to rest assured. Engineering companies do not have to worry about the hard drive out of the problem and often come home services, so that the cost of services increased dramatically, and even lead to a loss of the entire project.
For end users, if the hard disk failure is less, then the risk of data loss is reduced, the system is more secure, so that the monitoring system to play its due role.
The following is not our commonly used home desktop or notebook hard disk, but DVR dedicated hard disk. They are special users for security, defense industry or DVR system users need to run continuously provide mass storage products with high reliability, customized performance, users can more easily store management and monitoring video, his own TV show, videos, photos and other documents.
These DVR special hard disk although the appearance and ordinary PC hard disk is no difference, but the function and parameters of the DVR dedicated hard disk is more suitable for professional purposes, they are as follows:
Applicable environment
Ordinary PC hard disk
The design of general PC hard disk is to meet the developing trend of PC application, which is more reliable system data storage, application support and fast storage response time.
The more reliable system data storage is that the hard disk system can guarantee the reliable and safe storage of many kinds of system data in a hard disk (including the array) system. Application support for diversity refers to the hard disk can support a wide range of applications: PC desktop applications, multimedia applications and games, etc..
DVR dedicated hard disk
DVR dedicated hard drive is designed to meet the requirements of digital hard disk video recorder for system data and digital image information storage requirements.
DVR dedicated hard disk for the reliable support of system data is extremely stable. The digital hard disk video recorder and the features of the system, the system of PC type digital hard disk video recorder is single (not may occur in multiple systems, application systems support situation) is the digital hard disk recorder custom (does not exist in many applications coexist situation); and the embedded digital video recorder is generally no concept of the so-called system the system is built, and the hard disk.
DVR special disk cater and playback in digital video recorder digital image as a file, and according to the characteristics of digital hard disk recorder input and playback is optimized in order to fully protect the streaming media support for hard disk.
Two, specific differences
Life of hard disk
Ordinary hard drive at the time of the start will be full speed start, the current current may be up to 2, or even higher. And monitor the hard disk boot time will be slow to accelerate, the current will be controlled at less than 2. Because the monitoring system is usually installed in a number of hard drives, so that in the start of the moment will produce a lot of starting current, if it is a common hard disk, then the power will be difficult to bear, and even burned.
In addition, the monitoring system for the transmission speed of the hard disk is generally not high, but it will be a small amount of data to read and write. Therefore, it is necessary to optimize the structure design of the monitoring system for the reading and writing of the head, so as to prolong the life of the magnetic head. The theory of monitoring the hard disk without fault running time is longer than ordinary hard disk, stability, reliability and higher.
Continuous working time difference
The design of general 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 work is to refer to the hard disk is in a state of reading and writing. Special attention is needed to power after the hard disk has two states: working state and wait state, which is the working state of the hard disk read and write, wait state is not hard to read and write the work but is in a standby state.)
The DVR special hard disk is designed and developed according to the enterprise level environment of 7 * 24. 24 * 24 is working 7 hours a day, 7 days a week (that is, continuous work). So PC is not suitable for long time continuous hard disk read and write, if the hard disk damage common PC disk read and write for a long time will be great, abnormal sound, the hard disk read and write errors, which leads to many problems such as the suspension of hard disk damage eventually.
Digital hard disk recorder is a perennial running, so the hard disk must be able to work for a long time, to meet the requirements of the DVR dedicated hard disk.
Start difference
All of the 3.5 inch hard disk contains the motor system, so the hard disk power and motor starting when power up the situation is similar: in the initial period of time and will appear larger starting current to complete the hard disk boot. If the external power supply system when the hard disk can not protect enough current support, the hard disk will start failure, leading to the hard disk is not available. And if this occurs repeatedly, it is easy to cause damage to the hard disk. Because the power supply of the hard disk motor is satisfied by the DC 12V of the external power supply system, the current of the DC 12V is the standard of the evaluation of the starting current of the hard disk. Normal PC hard drive current