On our site and blog, we have posted many articles for recovering lost files and help more user to protect their computer data. However, there are still many users want to as the way for protecting the data from corruption or loss. This time this article presents an overview of the possible causes of data loss and how to protect the network against them. You will learn about systems and processes for preventing data loss.
A site disaster is defined as anything that causes you to lose your data. Many large organizations have extensive disaster-recovery plans to maintain operations and rebuild after a natural disaster such as an earthquake or a hurricane. Many, but not all, include a plan to recover the network. However, a network can incur a disastrous failure from many more sources than natural disasters. Disaster recovery for a network goes beyond the replacing of the physical hardware; the data must be protected as well. The causes of a network disaster, ranging from human acts to natural causes, include:
- Component failure.
- Computer viruses.
- Data deletion and corruption.
- Fire caused by arson or electrical mishaps.
- Natural disasters, such as lightning, floods, tornadoes, and earthquakes.
- Power-supply failure and power surges.
- Theft and vandalism.
In the event of a site disaster, the downtime spent recovering data from backup storage (if you have backups) could result in a serious loss of productivity. And without backups, the consequences are even more severe, possibly resulting in significant financial losses. There is one way I want to tell users to avoid data loss problem-backup.
The simplest, most inexpensive way to avoid disastrous loss of data is to implement a schedule of periodic backups with storage offsite. Using a tape backup is still one of the few simple and economical ways to ensure that data remains safe and usable.
Experienced network engineers advise that a backup system should be the first line of defense against data loss. A secure backup strategy minimizes the risk of losing data by maintaining a current backup—copies of existing files—so that files can be recovered if harm comes to the original data. To back up data requires:
- Appropriate equipment.
- A regular schedule for periodic backups.
- Ensuring that backup files are current.
- Personnel assigned to make sure this schedule is carried out.
The equipment usually consists of one or more tape drives and tapes or other mass storage media. Any expense incurred in this area is likely to be minimal compared to the value of what will be saved in the event of data loss.
Implementing a Backup System
The rule is simple: if you cannot get along without it, back it up. Whether you back up entire disks, selected directories, or files depends on how fast you will need to be operational after losing important data. Complete backups make restoring disk configurations much easier, but can require multiple tapes if there are large amounts of data. Backing up individual files and directories might require fewer tapes, but could require the administrator to manually restore disk configurations.
Critical data should be backed up according to daily, weekly, or monthly schedules, depending on how critical the data is and how frequently it is updated. It is best to schedule backup operations during periods of low system use. Users should be notified when the backup will be performed so that they will not be using the servers during server backup.
Selecting a Tape Drive
Because the majority of backing up is done with tape drives, the first step is to select a tape drive, weighing the importance of a variety of factors, such as:
- How much data needs to be backed up.
- The network’s requirements for backup reliability, capacity, and speed.
- The cost of the tape drive and related media.
- The tape drive’s compatibility with the operating system.
Ideally, a tape drive should have more than enough capacity to back up a network’s largest server. It should also provide error detection and correction during backup and restore operations.