Chapter 16 - Network maintenance. In this chapter, students will be able to understand: Magnetic tape is the most popular storage medium for backups; backup software enables you to select the data you want to back up and sends it to the device you use for backups; daily backup jobs can be full backups, incremental backups, or differential backups;. | Chapter Overview Backups Antivirus Policies Patches and Updates What Is a Backup? Backups are copies of data that you make on a regular basis, allowing you to restore lost data in a timely manner. Even if you have other storage technologies in place that provide fault tolerance, you still need a backup solution. Networks both complicate and simplify the process of making regular backups. More complicated because you have data stored on multiple devices that must be protected Simpler because you can use the network to access those devices A network backup strategy specifies what data you back up, how often you back it up, and what medium you use to store the backups. The backup hardware, software, and administrative policies you will use depend on how much data you have to back up, how much time you have to back it up, and how much protection you want to provide. Selecting a Backup Drive Try to automate as much of the backup process as possible. Select a device that can store . | Chapter Overview Backups Antivirus Policies Patches and Updates What Is a Backup? Backups are copies of data that you make on a regular basis, allowing you to restore lost data in a timely manner. Even if you have other storage technologies in place that provide fault tolerance, you still need a backup solution. Networks both complicate and simplify the process of making regular backups. More complicated because you have data stored on multiple devices that must be protected Simpler because you can use the network to access those devices A network backup strategy specifies what data you back up, how often you back it up, and what medium you use to store the backups. The backup hardware, software, and administrative policies you will use depend on how much data you have to back up, how much time you have to back it up, and how much protection you want to provide. Selecting a Backup Drive Try to automate as much of the backup process as possible. Select a device that can store all of your data without frequent media changes. Consider the speed at which the drive writes data to the medium. The amount of time that you have to perform your backups is sometimes called the backup window. The backup device that you choose should depend in part on The amount of data you have to protect The amount of time that you have to back it up Determining Backup Costs Cost is always a factor in selecting a hardware product. Faster drives are generally more expensive. A low-end backup drive can cost $100 to $200, which is suitable for backing up a home computer where speed is not a major factor. High-end backup drives can have prices that run into five figures. When you evaluate backup devices, be aware of the product’s media costs as well. Some products might seem economical because the drive is inexpensive, but in the long run they might not be, because the media are so expensive. Determine the cost per megabyte of the storage a drive provides. Divide the price of the .
