DOM Electronic Hard Drive Application System
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1. Problem statement
Taking the current school computer system selection as an example, there are generally the following options: 1. System built with disk PC; 2. Network-based NC and WBT systems; 3. Diskless RPL, PXE workstation system. These three systems have their own advantages and disadvantages. The disk PC system has good performance and powerful functions, and best meets teaching requirements. However, the disk PC system lacks the advantage of centralized management, and there are considerable problems in terms of price, anti-virus, maintenance, software and hardware upgrades, and replacement costs. The diskless NC, WBT, RPL, and PXE workstation systems all have the advantages of centralized management and low terminal maintenance, but the performance and functions of the diskless system are far from meeting the school's teaching requirements, and the server-side system of the diskless system is quite complex, which also brings maintenance and system stability problems! Is there a system that combines all the advantages of disk PC and diskless PC? Yes, that is the innovative and revolutionary product - DOM Electronic Hard Drive System! 2. Overview of DOM Electronic Hard Disk System
The DOM electronic hard disk system is based on FREE BSD (a special partition format that cannot be recognized by other operating systems) and LINUX (a software expensive operating system recognized as the most efficient and secure), and uses the unique ENCP virtual disk technology to transmit data, so that each terminal in the LAN does not need a hard disk, but can give full play to the performance of a PC with a disk, and eliminates the troubles in the process of using a PC with a disk, such as viruses, upgrades, maintenance, and heavy usage burdens. DOM (electronic hard disk system terminal) is not a traditional diskless terminal; after the terminal is running, the DOM system enables each terminal to have a real physical hard disk, and can read, write, format, partition, and even Ghost the physical hard disk owned by the terminal; so that the terminal can realize the centralized management, centralized storage, and centralized maintenance of the terminal's operating system, application software, and data while maintaining the same functions as a PC with a disk. 3. Working principle of DOM electronic hard disk system
1. Structure of DOM electronic hard disk system
DOM electronic hard disk system consists of three parts: manager end (server) hard disk, workstation end virtual disk, and dedicated communication protocol. The following is a schematic diagram:
Related pictures of this topic are as follows:
 580)this.width=580" border=0> (System structure diagram)
2. DOM electronic hard disk system hard disk virtual mode
manager storage space is divided into two parts in use
① Common part: This space stores programs common to users such as operating system, application programs, etc.
② User personal space: Stores personalized data such as user personal files, personal application programs, etc.
Related pictures of this topic are as follows:
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The virtual local hard disk seen by each user actually consists of two parts: system shared space + user-specific space.
The workstation can also be equipped with a local hard disk to work with the virtual hard disk. It can be booted from the DOM electronic hard disk system.
3. Working principle of DOM electronic hard disk system
When the machine is turned on, the hard disk on the manager side (server) and the virtual disk on the workstation side are seamlessly connected through a dedicated communication protocol, and data is transmitted back and forth in the form of disk tracks. Therefore, the workstation can see a physical hard disk when working, which is a true electronic hard disk. IV. Functions of DOM electronic hard disk system
1. Help users greatly reduce the cost of purchasing computer software and hardware equipment and system construction and maintenance.
2. Centralized data control and maintenance to achieve higher data confidentiality and security.
3. DOM provides a complete system backup mechanism to quickly restore system operation without the need to purchase expensive software and hardware equipment.
4. DOM has real-time system backup and recovery functions to improve equipment utilization and greatly reduce the burden of MIS personnel on system maintenance.
5. Meet the six requirements of corporate computer equipment: fast installation, easy expansion, wide compatibility, simple maintenance, cost reduction, and confidentiality and security. V. Features of DOM Electronic Hard Disk System
1. Stable performance, avoid blue screen, freeze, jam: Through the unique virtual disk technology to optimize the network reading, the running speed of each terminal application can be comparable to that of the physical hard disk, and some applications can even run faster than the physical hard disk. The terminal can be temporarily suspended when the network is suddenly interrupted or the server crashes, and the terminal can continue to run after the network is restored;
2. Save investment: The terminal does not need a hard disk, hard disk protection card, floppy drive and optical drive. The money saved by a set of dozens of computers in the network is considerable. In addition, for the reconstruction of the old network, the original equipment can be directly used to protect the original investment.
3. Easy maintenance: The entire network can be managed by managing the server. The installation and upgrade of the software only need to be carried out on one terminal, and all other terminals can use the latest software. The maintenance of the entire system is actually just the maintenance of the server, and there is no need to deal with each terminal one by one, which reduces the heavy machine maintenance to a minimum and greatly saves manpower and time.
4. Anti-virus: Reduce the probability of virus infection within the network to zero. Even if the terminal is infected with a virus, the image file on the server is just an ordinary file, and the server does not need to be disinfected.
5. Controllability and data security: The terminal can be controlled to install software that is not related to office work (such as games, QQ, etc.) privately; confidential data will not be leaked through these channels.
6. Disk snapshot technology: Disk snapshot technology allows each terminal to exclusively own the shared hard disk, so that each terminal can read and write the hard disk at will, add and delete files, and even format the system hard disk, and automatically restore to the original state when it is restarted next time.
7. High network utilization: The excellent network performance and buffering performance of FREE BSD (a special partition format that runs on other operating systems that cannot be recognized) and the recognized most efficient and secure operating system based on LINUX can maximize the potential of the existing network.
8. Support for multiple platforms and multiple operating systems: The DOM electronic hard disk system supports clients with operating systems on different platforms such as DOS, Windows 9x/Me/2000/XP, and Linux.
9. Good compatibility: DOM terminal implements a real physical hard disk. From 3D online games to large database applications, all application systems based on hard disk storage can run very smoothly on the DOM electronic hard disk system.
10. Power saving: A 40G/7200 rpm hard disk consumes an average of 0.48 degrees of electricity per hour after repeated tests by a professional company. A DOM electronic hard disk system network can save 1/3 of the electricity bill per month. 6. Configuration requirements of DOM electronic hard disk system
1. Workstation: (Each workstation needs to be equipped with a dedicated "electronic hard disk (PCI) card")
running WIN98, WINME Configuration:
P300, 32M or above (it is recommended to use a higher configuration, the higher the configuration, the faster the running speed) WIN2000 configuration:
P500, 64M or above (it is recommended to use a higher configuration, the higher the configuration, the faster the running speed)
The various configurations of the host must be consistent, such as: motherboard, graphics card, slot position 2. Management machine (server): (Each server needs to be equipped with a "management (PCI) card" and a "gigabit network (PCI32/64-bit) card")
P4 1.8 or above, 512M, 80G dual hard disk plus IDE RAID card, the motherboard should preferably have a 64-bit PCI slot 3. Network environment: (For WIN2000 system, the switch should have a Gigabit module)
WIN98 100M network environment
WIN2000 1000M trunk (server to switch, etc.), 100M branch
7. Wide application of DOM electronic hard disk system
1. Teaching system: office and teaching in teaching buildings and electronic classrooms.
2. Internet cafes and hotels: with VOD on-demand function.
3. Government, banks, taxation, post and telecommunications, comprehensive halls: the characteristics of this system also determine its use in the local area network system of external offices, business halls or internal management of government, banks, taxation, post and telecommunications, and comprehensive halls.
4. Public security, customs, and military departments: It is precisely because the system has flexible centralized control and strong security and confidentiality, and has good resource sharing, so it can be used in the internal data processing system of public security or customs, and the internal command system and information processing system of the military.
5. Civil aviation system: airport check-in, internal office building, centralized ticket hall
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