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It marks files so that you will know whether a specific file has been backed up You need to create a complete normal backup of your system before you can run incremental backups If you use a combination of normal and incremental backups to restore your data, you must have the last normal backup set of media as well as every incremental backup in chronological order since the last normal backup Differential A differential backup can reduce the time required to complete the backup process by copying files that have been created or changed since the last normal or incremental backup It does not mark files as backed up You need to create a complete normal backup of your system before you run differential backups.

If you use a combination of normal and differential backups, you must have the last normal backup media set and the last differential backup set to restore your data Copy A copy backup copies all selected files, but it does not mark each copied file as backed up Copying is a useful temporary method to back up files between normal and incremental backups; it does not affect other backup operations Daily A daily backup copies all selected files that have been modified on the day that the daily backup is performed The backed-up files are not marked as backed up Some backup types use a backup marker, also known as an archive attribute, to track when a file has been backed up When the file changes, Windows XP Professional marks the file to be backed up again.

Files or directories that have been moved to new locations are not marked for backup Backup allows you to back up only files with this marker set and to choose whether or not to mark files when they are backed up..

The Display tab, shown in Figure 16-11 on the next page, allows you to modify the display options for the window containing the remote session. The supported resolutions range from 640 480 to Full Screen. You can also specify the color depth to use for the connection as well as decide whether or not to display the connection bar when in full screen mode. The connection bar is displayed at the top of your display. It displays the name or address of the computer hosting the remote session and lets you minimize the remote desktop, maximize it to full screen, place it in a window that you can size on your local computer, or close it entirely (which terminates the session).

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Backup protects against data loss caused by a virus. Because some viruses take weeks to appear, keep normal backup tapes for at least a month to make sure that you can restore a system to its uninfected status.

Windows XP Professional can back up files to a variety of storage devices. Data can be backed up to tape drives, disk volumes, removable disks, and network shares, or to a library of discs or tapes in a media pool controlled by a robotic changer. If you do not have a separate storage device, back up to a local hard disk or to floppy disks.

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Storage technology changes rapidly, so it is important to research the merits of various media before you make a purchase. When you select a storage device, consider storage device and media costs, as well as reliability and capacity. Ideally, a storage device has more than enough capacity to back up the combined data of all local hard disks and can detect and correct errors during backup-and-restore operations. For information about specific storage devices, see the Windows Catalog at http://www.microsoft.com/windows/catalog. Tip

To make sure that your storage devices and media work correctly, verify your backups by performing test restores.

Figure 5-11 Before (left) adding the code snippet using Surround With and after (right)

The most common medium is magnetic tape. Commonly used tape drives for backup include a quarter-inch cartridge, digital data storage (DDS), 8 mm cassette, Advanced Intelligent Tape (AIT), digital linear tape (DLT), and Super DLT (SDLT). High-capacity, high-performance tape drives typically use small computer system interface (SCSI) controllers. Other types of media include magnetic discs, optical discs, and CD-ROMs recordable CD-ROM (CD-R) and rewritable CD-ROM (CD-RW). Note

Figure 16-11. Use the Display tab to adjust the desktop size and color depth of the remote session.