Introduction and maintenance of diskless teaching Network

No-disk teaching network is a teaching network which is constituted by diskless workstation. Diskless workstations are "triple-free" computers connected to the LAN (no floppy disk, no hard drive, no optical drive), and the operating system and the applications running are stored in the LAN file server.

Because of its low cost, safe and reliable, easy to manage and so on, many schools, especially the majority of rural primary and secondary schools are using Windows NT Server 4.0 Server +windows 9x diskless Workstation form to build teaching network. How to effectively manage and maintain the diskless network after it has been built? Below, I will talk about diskless teaching network maintenance skills and methods.

First, hardware maintenance

Hardware is a disk-free network of visible, touching parts, including computers (workstations and servers), network cable, hub (hub) and other equipment. Hardware maintenance is relatively simple:

1. Dust is one of the important causes of computer malfunction. The computer should be cleaned regularly, the computer class should wear clean slippers, the regular use of brush remove the host power supply, hub (hub), cable connectors, CPU fan, motherboard and memory on the dust.

2. Because the computer in the running process will produce a lot of heat, therefore, the microcomputer room should be kept ventilated, conditional words can also be equipped with air-conditioning.

3. Computer should maintain a certain humidity, not too dry or too wet.

4. To prevent the failure of a diskless network server from sudden power outages at run time, a small ups should be prepared for it, and a voltage regulator and UPS can also be installed for the entire network if conditions so required.

5. According to the actual situation of schools, the establishment of Computer Management system.

Second, the Software maintenance

Computer room software maintenance involves many computer network expertise, especially diskless network, installation, Setup more complex. In diskless network maintenance, I think, "perfect backup" is a good method. The so-called "perfect backup" is the normal operation of the teaching network, the network server in the key files, directories back out, in the case of the server and then backup files, directories copied back to the server to repair the fault.
1. Back up the "X:WINNTRPL" directory ("X" is the partition on which the system is located) in the server for Windows NT Server 4.0 (hereinafter referred to NTS 4.0). The Windows 9x diskless workstation is launched through the Bootrom chip on the network card to the server to send a remote boot request, and then by the server to pass the remote boot file, the RPL directory is stored in the remote boot configuration files and some necessary system files.

2. Back up the remote boot database. Each card has a unique address number, NTS 4.0 remote boot only supports the first six-bit address number is 0020AF or 00608C network card, the other number of network cards must be added to the remote boot database through the Rplcmd command, in order to achieve diskless boot. Once the database is corrupted, the client cannot start. Therefore, it is important to back up the remote boot database. How to: Open "start → program → administrative tools (public) → remote Boot manager → configuration", select "Backup Database".

3. Back up the Windows 9x source files. Windows 9x source files do not have a defined directory name, it is generally under the system partition, the size of 90MB or so, must have shared properties. The common directory name is Win9xs, WIN9XB, or Sbsfile.

4. The working directory of the backup workstation. The directory, also known as the Machine directory, does not have a certain directory name, including all registry files (System.dat, User.bat, etc.), startup configuration files and Win.com, System.ini, Win.ini, and so on. The obvious characteristic is how many student computers there are in the teaching network, how many such catalogues (general name is xx01, xx02, xx03 ...). Since these working directories include key files such as system registry, startup profile, and are user-oriented, they are very vulnerable and must be backed up properly. (Computer science)

In addition, the maintenance of the diskless teaching network should also pay special attention to:

1. Backups of critical files and directories cannot be copied only to the network server hard drive. Diskless network failures are generally due to the damage caused by the server's hard disk, so the backup files on the hard disk is likely to be destroyed, especially when the consequences of the virus is unimaginable. So the best way to do this is to back up the key files and directories to another hard drive. Of course, if you have a burner, you can burn these files and directories to a disc, which is also a good way to prevent the backup files from being compromised.

2. Before the backup application of the latest anti-virus software to kill the virus, confirmed non-toxic before you can start backup, failure, should also first kill virus, confirm non-toxic and restore original files and directories.

3. Daily should frequently scan, tidy up the hard disk, delete useless files, try to avoid server failure. The safe and stable operation of teaching network is of great significance to the development of information technology education.

The establishment and maintenance of diskless teaching network involves a lot of professional knowledge, and the method of "perfect backup" can cross the barrier of professional knowledge and effectively maintain the diskless teaching network. The author thinks that it is the best way for teachers, especially non computer professional teachers, to maintain the diskless teaching network.