What Are the Different Options for Computer Disaster Recovery?

Disaster backup is the key infrastructure for information system security. Disaster backup systems must be constructed for important information systems to prevent and withstand the devastating blows brought by disasters. Data is an extremely valuable asset. To ensure the continuous operation and success of government information systems, computer-based information must be protected. Human error, hard disk damage, computer viruses, natural disasters, etc. may cause data loss and cause inestimable loss. The loss of system data will result in the loss of system files, transaction information, user information, technical files, and financial accounts, and it will be difficult for business to proceed normally.

Data backup and disaster recovery basics

Right!

Disaster backup is the key infrastructure for information system security. Disaster backup systems must be constructed for important information systems to prevent and withstand the devastating blows brought by disasters. Data is an extremely valuable asset. To ensure the continuous operation and success of government information systems, computer-based information must be protected. Human error, hard disk damage, computer viruses, natural disasters, etc. can all cause data loss and cause inestimable losses. The loss of system data will result in the loss of system files, transaction information, user information, technical files, and financial accounts, and it will be difficult for business to proceed normally.

Chinese name

Data backup and disaster recovery basics

the reason

System hardware failure

Background

The Internet has penetrated into all areas of human society

Backup method

Regular tape backup data

As the amount of information stored on computers continues to grow, data backup and disaster recovery have become interesting topics. Disaster backup is the key infrastructure for information system security. Disaster backup systems must be constructed for important information systems to prevent and withstand the devastating blows brought by disasters. Data is an extremely valuable asset. To ensure the continuous operation and success of government information systems, computer-based information must be protected. Human error, hard disk damage, computer viruses, natural disasters, etc. can all cause data loss and cause inestimable losses. The loss of system data will result in the loss of system files, transaction information, user information, technical files, and financial accounts, and it will be difficult for business to proceed normally. ^[1]

Due to the important status of data backup, it has become a relatively independent branch structure in the computer field. In general, the backup programs attached to various operating systems have one or another of these defects, so if you want to reliably back up your data, you must choose special backup software and hardware, and develop a corresponding backup and recovery plan. In developed countries, almost every network information system is equipped with a dedicated external storage backup device, and these devices have indeed played a role in turning the tide of many catastrophic data loss incidents. ^[1]

Data backup is the basis of disaster recovery. It refers to the process of copying all or part of the data set from the hard disk or array of the application host to other storage media in order to prevent data loss caused by system operation errors or system failures. Traditional data backup mainly uses internal or external tape drives for cold backup. However, this method can only prevent human failures such as operation errors, and the recovery time is very long. With the continuous development of technology and the massive increase of data, many enterprises have begun to use network backup. Network backup is usually achieved through professional data storage management software combined with corresponding hardware and storage devices. ^[1]

There are various reasons for data disasters. Threats to data are usually difficult to prevent. Once these threats become reality, not only will the data be damaged, but the system that accesses the data will also be destroyed. The main causes of data loss and destruction are as follows:

(1) Data processing and access software platform failure.

(2) Vulnerabilities in operating system design, or "black holes" preset by the designer for unspeakable purposes.

(3) System hardware failure.

(4) Human error.

(5) Malicious destruction by illegal visitors in the network.

(6) The network power supply system is faulty.

(7) Natural disasters such as typhoons, floods, earthquakes, and lightning strikes, and accidents such as fires, landslides, and power supply.

Here is a brief introduction to the more common backup methods:

(1) Regular tape backup data.

(2) Remote tape library and disc library backup. The data is transferred to a remote backup center to make a complete backup tape or disc.

(3) Remote key data and tape backup. Using tape to back up data, the production machine sends critical data to the backup machine in real time.

(4) Remote database backup. It is to establish a copy of the primary database on a backup machine that is separate from the production machine where the primary database is located.

(5) Network data mirroring. In this way, the database data of the production system and the updates of important target files that need to be tracked are monitored and tracked, and the update log is transmitted to the backup system through the network in real time, and the backup system updates the disk according to the log.

(6) Remote mirror disk. The high-speed Fibre Channel line and disk control technology are used to extend the mirror disk away from the production machine. The mirror disk data is completely consistent with the main disk data. The update method is synchronous or asynchronous.

The above backup methods are the data backup methods often used in various fields. Different backup methods are applied in different environments. What backup method we choose to use can be used to back up data more securely and reliably. We need us. In the specific case of using data backup, adopt appropriate backup strategies and backup methods.

The importance of data backup is self-evident. Important data, files, or historical records in a computer are vital to both business users and individual users. Once accidentally lost, it will cause immeasurable losses. Fortunately, the painstaking efforts accumulated will be lost, which will seriously affect the normal operation of the enterprise and cause huge losses to scientific research and production. In order to ensure the normal operation of production, sales, and development, enterprise users should take advanced and effective measures to make reasonable backups of data to prevent it before it happens.

Data backup and disaster recovery are inseparable. The purpose of data backup is to prevent data disasters, and to perform disaster recovery in a timely and effective manner when disasters occur. So what is disaster recovery? First look at what a disaster is. For business interruptions related to the IT field, the consequences of data loss are the most damaging. Regardless of whether the loss of data is caused by accidental or intentional deletion, or data corruption in the storage medium, which can cause the system to stop abnormally, we can call it a disaster. Disaster recovery refers to the process of re-enabling the data, hardware and software equipment of the information system after natural or man-made disasters to restore normal business operations. Disaster recovery planning is part of a broader business continuity plan. At its core, it assesses and prevents catastrophic risks for an enterprise or organization, and in particular records, backs up, and protects critical business data and processes in a timely manner.

Why is there disaster recovery? Obviously, with the popularization and application of computers becoming more and more powerful, the security problems of computers have become a long-term and arduous subject accompanying computers. While using computer systems to handle daily business increases efficiency, it also creates new problems, namely data failure. Once data failure occurs, the enterprise will be in trouble, customer data, technical files, financial data and other data may be damaged, and the allowable recovery time may be only a few days or less. If the system fails to recover smoothly, the final outcome is unimaginable. So the higher the level of informatization of a business or crime, the more important backup and disaster recovery measures are. ^[1]

Here is an example to deepen your understanding of data disasters and help understand the role and significance of disaster recovery. Losses from neglecting data backup issues abound, such as unpredictable natural disasters and emergencies, which often become a major cause of permanent data loss. In the afternoon of February 26, 1993, a huge air wave erupted from the underground parking lot of the World Trade Center in New York. In an instant, the entire building system was paralyzed. Almost all of the office equipment of those companies near the ground floor were destroyed, and all important data such as customer information and financial accounts were swept away. According to post-event investigations, in this incident, all companies that did not take backup measures beforehand all suffered serious losses due to data loss, and a considerable part of them even closed down because of this. Another opposite example comes from the city of Grand Forks in the United States. A flood at the time caused two-thirds of the city's businesses to suffer huge losses, and most of them fell into a slump until they eventually closed down. One of the companies, Ecolab, was miraculously unaffected, but as its former competitors were in trouble, the business became more and more prosperous. The reason is simple. Ecolab backs up its network every day. On the day before the flood, Ecolab backed up its network data in accordance with established practices and stored the backup disks in a safe place. In this way, the day after the flood, when other companies were struggling with lost customer information and financial accounts, Ecolab started business at 7 am on time. ^[1]

I believe readers can understand that the focus of these frequent accidents has focused on how to protect the security of data. With the upsurge of network construction in the world in recent years, the network has penetrated into all areas of human society. Currently, more than 95% of computers in the United States have entered the network. In China, network computers are also growing at an extremely fast rate. The popularity of the Internet not only simplifies the communication of information between people, but also increases the amount of information at an accelerated rate. However, while enjoying the great convenience brought by the Internet, we have not realized that data has become an indispensable factor in our work and life, and we have not realized that the loss of data will bury the hidden dangers of disaster to human beings. In fact, the most fundamental purpose of building a network is to transmit information more conveniently. If we cannot guarantee the security of this information, then our large investment in the network will lose its original meaning. Therefore, the data in the computer is our most precious property. Hardware failures, human error operations, various viruses, and natural disasters threaten the security of our precious data all the time. When unpredictable accidents or disasters lead to data loss, timely disaster recovery measures can minimize the loss of the enterprise or organization. ^[1-2]