Disk array cabinet is a very mature data storage device. The development of disk array applications has gone through three stages: pure software, built-in boards and independent peripherals. There are two types of existing applications: a, low cost. Software-only and built-in board mode; b, high-cost independent peripheral mode.
a. Pure software and built-in boards have lower RAID costs, but occupy host resources, performance is limited and difficult to optimize, especially without decoupling from the application system. When the host environment is damaged, if the configuration cannot be completely restored, the disk may be caused. The data in the array cannot be recovered.
The NAS itself is an independent, peripheral, and powerful RAID. The cost is slightly higher than that of pure software and built-in boards, but it is worth considering from the perspective of occupying host resources or data security. of.
b. High-cost independent peripherals Compared with NAS, the cost difference is very large. The high-performance disk array cabinets range from several hundred thousand yuan to over one million yuan. Disk array cabinets are more suitable for large enterprises (groups). As a central storage and backup device for large and medium-sized networks, NAS is more suitable for small businesses or personal studios as storage backup devices.
2) Comparison of setup and ease of use:
The setup of the RAID and the cooperation with the server need to be managed by professionals who are very familiar with the computer network, but the use and operation interface of the NAS (such as the famous Canadian storage device manufacturer is free to develop a Chinese language for the Chinese market). The interface's control management software greatly facilitates the usage habits of domestic users. It is easy to manage without the need for highly professional personnel, so the cost of daily network management is also very different;
3) Comparison of recovery methods after the control system is damaged:
After the RAID card is damaged, the storage system can be said to be catastrophic. At this time, you need to take out the hard disk and hand it over to a professional data recovery company for data recovery. If the NAS hardware is damaged, you can install the hard disk in the original arrangement on another NAS of the same model, and the data can be used normally.
4) Support for operating systems Disk array cabinets are weak in support of heterogeneous platforms. Currently, most disk array cabinet products on the market usually only support one operating system. If there are two operating systems in the enterprise, such as design The department uses the MAC operating system, and the finance department uses the WINDOWS operating system. When this happens, the disk array cabinet is more troublesome when storing data in two departments; and the NAS is relatively different from the disk array cabinet for handling heterogeneous operating platforms. It has an absolute advantage, because it can support most of the mainstream operating systems at the same time, under the use of a network, you can simultaneously store WINDOW, LINUX, MAC data in the NAS, without the need for related The data is specially processed;
5) Data backup function Because the disk array cabinet generally uses the CPU of the desktop as the processor, compared with the embedded, low-power dedicated CPU used by the NAS, the disk array cabinet is faster in data storage than the NAS. In terms of data backup, since NAS adopts dedicated backup software, data backup adopts a more reliable and accurate track-based backup method, which is more advantageous than disk array cabinets, and because NAS is specialized The designed backup software is more reliable in terms of functions than the general software adopted by the disk array cabinet. For example, the backup software that comes with the free NAS is easy to use, efficient and reliable.
6) From the data security in the normal data storage backup situation, both can achieve high data security, NAS is a completely independent device, and the disk array cabinet is a server-dependent device. This means that if the server is corrupted, the data in the NAS can still be read by other computers, and the data in the disk array cabinet can only be read after the server is repaired. In terms of data disaster recovery, NAS is easier to build a data disaster recovery system because it is not restricted by geography. At the same time, NAS has better response capability in post-disaster data crisis management. This is why NAS is abroad. The main reason for the large number of applications in the data disaster recovery system of small and medium-sized enterprises.
Disk Array Cabinets <br> Because disk array cabinets have the advantages of fast data storage and large storage capacity, disk array cabinets are generally suitable for mass data storage in small and medium-sized central cluster network storage areas within enterprises.
High Speed Door Motor And Control Box
Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller.
About our German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. The series has a suitable design in its range for the globally applicable efficiency classes. Select the power and frequency within this motor design and you have already taken care of the most important selection criteria.All other motor options are of course available independently of the efficiency class. A comprehensive braking concept and cost-optimised built-in encoders ultimately complement the motor range. Comprehensive braking concept and combinations i.e. up to three different brake sizes per motor size featured in the range: Cost-optimised built-in encoders integrated into the motor. Motors for efficiency classes IE1 to IE4.Compact design saves space and costs. Future-proof, also as regards environmental protection (standards). Reduction in operating costs when using energy-efficient motors; our energy-efficient motors conform to the efficiency classes.
About servo High Speed Door Servo Control System: Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. The rolling curtain can be controlled by pull switch, push button, Bluetooth, ground radar, ground magnetic sensors. Operating Speed: 1M/s; Operating Width: ＜16 ㎡; Daily operating time: ＞2000 time; Rated voltage: 220v; Rated Output: 0.75 KW/1.5KW.
The system can operated via: 1) control box; 2) inching electronic control; 3) continuous automatic operation; 4) emergency stop; 5) single side operation box; 6) time delay; 7) ground radar and/or magnetic sensors. Please refer to Wiring Terminal for eternal connections.
System has fuse/safety wire shutdown switch for three-phase power protection, fuse/safety wire for operating circuit protection, and temperature sensing relay for motor protection.
Stroke Controller utilizes absolute value encoder. Connect the absolute value encoder and reducer via encoder`s axle, and fix the wings on to the reducer, than insert the aviation plug into plug receptacle.
The mounting screw for the control box must inspect regularly to prevent screw been getting loose and falling off. Check the internal and external wirings. Check and change the oil for the redactor on regular basis.
Precision: The system use Full closed-loop servo control and Double Encoder design. This is to ensure long operating life and to prevent overshooting during operating.
Stability: The system utilizes integrated design concept, in order to simplify internal wiring and prevent any function caused by wiring and terminal connections.
High Speed: Motor max speed is 2500 rpm; door max operating speed is 2 m/s.
Smooth: The torque servo system can adjust torque to the load automatically, and its speed curve mode step less speed regulating to ensure a smooth operation.
About SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning. The braking time within 0.2 second. Electric motor is added the DZM series direct current electromagnetic arrester by the basic series(Y series) electric motor.The protection class of electric motor part is IP44,the arrester part is IP23.if be applicable to bad environment can also make the arrester part into IP44,but customer have to put forward a special request while ordering,the manufactory can design a manufacturing exclusively. Its structure diagram is picture 1 and 2,picture 1 is the structure with hand release.Picture 2 is the structure without the hand release.Its operating principle BE, after being to make the retardation coil(6)to connect direct current power supply,because of the function of electromagnetic force,electromagnet(7)attract gag bit(5),and compress spring(24),make arrester disc(2)away from the friction surface of the gag bit(5)and shield(26)(the electrical motor can immediately operate normally).When the power supply cuts off after,the electromagnet(7)loses electromagnet force,the spring(24)releases the gag bit(5)and compress tightly to arrester disc(2),the arrester function,stop(the motor shaft)quickly,make electric motor shop turning to move,for the second time connect power supply will repeat above-mentioned action.
High Speed Door Motor And Control Box,High Speed Door Motor,High Speed Door Servo Motor,Variable-Frequency Servo Motor
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com