Compared with famous industrial computer brands, such as YONGS industrial computer, industrial computer, EVOC industrial computer, Axiomtek HTC industrial computer, etc., the application is based on industrial-grade CF card or solid-state hard disk, but the frequency of the power grid fluctuates, the voltage is unstable, In an environment with poor ambient temperature, humidity, and ventilation performance, industrial-grade hard drives are also easy to find problems. The editor of Shenzhen YONGS Co., Ltd. has carefully rectified a hard disk failure prevention strategy and repair method for industrial computers for your reference.
(1) The hard disk of the industrial computer interferes with the prevention strategy
The most common reasons for causing disk failure can be divided into the quality problems of the disk itself and the problems caused by the working environment.
As for the quality of the disk itself, we can't focus on it deeply. We only need to choose a hard disk with better quality and brand when we first do the control system. We can also use software such as Scandisk and Norton Disk Doctor to check the appearance of the disk. If we can predict the quality and health of hard drives, this will give us time to select hard drives and back up important data. The author discovered a software called Drive Health on the Internet, which can check the service life of the hard disk and help friends to know the health status of the hard disk in advance.
The obstacles caused by the working environment are more common in the following aspects:
1. The industrial computer has a long working time. Due to the necessity of normal manufacturing, the industrial control system of some manufacturers takes a long time to work, which brings great training to the industrial computer control system. According to Microsoft's operating system operating time report, Microsoft claims that its operating system after Windows 2000 can support long-term work, but from the perspective of actual operation, after the operating time spans over a week, the disk will be in the process of huge data exchange. A large number of data fragments are accumulated, which can easily become disk logical bad sectors, read and write failures, and slow system operation and startup. Therefore, the industrial computer can restart the industrial computer and defragment the disk on time under the conditions allowed by the manufacturing, so as to reduce the disk failure caused by the long-term work. The restart time can be determined according to the amount of data processed by the industrial computer and the manufacturing environment. It is not rigid and requires readers to try it out step by step. Judging from the author's actual experience, restarting and rectifying the industrial computer once a standard month (30 days) can reduce the chance of disk failure.
2. The temperature inside the industrial computer is too high. In an environment that requires a long period of high temperature operation, the components of the computer are prone to aging, and the frequency of hard disk failure is also higher. This requires the manufacturer's automation system guards to pay close attention to the chassis temperature during normal inspections, although the temperature of the industrial computer is kept between 10-30 degrees Celsius, too high and too low temperatures are not suitable for hard disks. Guard, if the case temperature reaches 30 degrees Celsius, the temperature of the hard drive inside will reach 40 degrees or higher. We can briefly DIR our industrial computer to achieve the effect of lowering the ambient temperature. 1. Replace the high-power CPU and hard disk fan (the hard disk fan should be kept unchanged, it should not be installed on the hard disk firmware frame to prevent the hard disk from being touched due to the fan rolling) to accelerate heat dissipation; Electric fans to increase air convection; 3. Install a small axial fan on the cabinet where the industrial computer is arranged; 4. Install air conditioners in the control room to lower the space temperature.
3. The ambient humidity is not suitable. The industrial computer is mainly composed of integrated circuits of many electronic components, and its insulation performance has a great relationship with the environmental humidity. If the humidity is too large, it will easily become a short circuit of the circuit board and destroy it; if the humidity is too small, it will easily generate static electricity, and it will also break down one-sided electronic components. Therefore, if the humidity is too large or too small, the city will bring potential threats to the industrial computer. On the subject of electrostatic protection, we must have good instrument grounding on our industrial computer. It is worth affirming that, the difference between the grounding of the industrial computer and the lightning protection grounding in civil construction, the grounding site should be three meters away from the control room, and the ∮20 galvanized angle steel should be used as the vertical and crisp ground at 1700 mm under the outdoor floor. The number of grounding resistance is less than 1 ohm (try the shaker when backfilling), and then use 40*40*4 galvanized flat steel and the grounding body to be reliably welded (each welding point should also be carefully rust-proof), and then assign it to the equipment Connect the 25mm copper cable to the system ground terminal and the address of the industrial computer. This can effectively reduce the risk of static electricity.
4. Great earthquake sense. Many manufacturers require the motor to produce drag, touch and other physical displacement movements, which not only bring huge noise, but also the touch brought by the mechanical operation will bring huge obstacles to the disk, optical drive, and floppy drive of the industrial computer. The technology of disk manufacturing is getting higher and higher, and the current speed has reached 7200 revolutions per second or even higher. In the large-scale data exchange in the automatic control system, the long-time, high-speed disk is easily triggered by the disk, causing the disk read and write ability to decline, the head positioning is slow, and even the disk is damaged; thus reducing the environment of the industrial computer. The shock is good for protecting the disk. We can try our best to keep the industrial computer away from the work site with a large earthquake source during engineering planning; if the work address cannot be changed, we can also place sponges and cushioning objects under the industrial control cabinet and box to reduce touch the risks posed.
5. There are many inhalable particles in the atmosphere. Most of the raw materials of many manufacturers need to be processed with powder materials. In addition, the external atmosphere is very active and there is a lot of sand and dust. A large amount of sticky dust is easily accumulated in the industrial computer, which causes the temperature inside the industrial computer to be too high, resulting in hardware damage. . This kind of environment occurs mostly around cooling fans such as CPU, power supply, hard disk, and graphics card. In places with light dust accumulation, in the environment allowed by normal production, it is possible to blow dust on time. In places where dust accumulation is relatively high, dust filter gauze can be installed at the ventilation place of the industrial control chassis, and the cleaning can be carried out on schedule.
6. The power supply voltage fluctuates greatly and is prone to power outages. With the rapid development of industry and life, the demand for electricity is also increasing day by day. In many areas, the environment of insufficient power supply, unstable voltage and easy power outage occurs. Unstable voltage and sudden power failure cause the system to restart frequently, and the system files are easily lost and cannot be started normally; the magnetic head that is performing the read and write operations may occasionally become the head return prohibition due to the power failure, which will cause the disk failure of the industrial computer. . Therefore, the consolidation of the power supply in the working environment of the industrial computer is related to whether the work of the industrial computer is normal or not. We can use regulated power supply and UPS uninterrupted power supply for protection, and the detailed equipment selection should be determined according to the size of the load power and the duration of the work.
(2) The essentials of repairing the hard disk of the industrial computer
GHOST clone mirror.
Design conditions: Only the system disk exploration is hindered, and the system disk can be normalized by FORMAT software. (The author has encountered twice that it is impossible to use the FORMAT software to design the system disk. In the master-slave mode, when visiting the system disk of the bad disk, it will remind the parameter failure, and restore it after accepting the low format)
Design materials: GHOST software, DOS system guide disk (CD, software, U disk)
Implementation of the plan: Most of the disk failures occur in the system disk (C drive). After the automation system is officially put into operation, first use the GHOST software to image the system disk, and put the image file (*.GHO) under the FAT32 disk format. Backup (because in a single-disk environment, GHOST recovery of the system disk is usually performed under DOS. DOS can only run under FAT32, FAT16 and other disk modes, and cannot be run under the NTFS partition mode.), once If the system disk is in trouble, the system disk can be changed in a quick way, and the original mirrored files can be restored to the system disk in about 5 minutes by using the GHOST software.
Plan conclusion: no equipment investment, no capital expenditure; rapid recovery rate. This program can only be used for operating system damage rather than physical damage to the disk; once the disk is physically damaged, this program will not work. This also applies to all disk mirroring.
Clone dual hard disk backup + GHOST image
Design conditions: IPC disk failure (whether it is system failure or disk physical damage)
Design materials: a disk of the same type in the index industrial computer, GHOST software, DOS system guide disk (CD, software, USB disk)
Plan implementation: Before the industrial computer system is put into operation, use the GHOST software to first mirror the system disk (C disk) with the control system disk to the non-system disk FAT32 disk pattern partition of the disk, and then clone all its hard disk contents completely. to a spare disk of the same type. Once the discovery operating system is damaged, the operating system image file can be restored; if all disk failures occur, the bad disk can be removed and replaced with a spare hard disk with the same content backed up first.
Project conclusion: only need to invest a disk of funds (about 400-800 yuan, depending on the size of the disk and the difference between manufacturers), easy to replace, fast recovery speed, and can solve all magnetic query problems.
Software disk array using Windows 2000 dual-disk RAID1 or three-disk RAID5 system
Plan conditions: the implementation time of this plan, fortunately, before the industrial computer is put into operation
Design materials: Windows 2000 system disk or later, two disks (similar models are appropriate)
Plan to implement: first install Windows 2000 system or later (because Microsoft is better on disk arrays after Windows NT), and start disk array function support. The disk array system can write the same content to the two disks at the same time during the writing operation of the industrial computer.
