Windows XP Home Networking: Backing Up Your Home Network( 二 )


Top of pageHow Do I Back Up?You"ll find the Backup program by clicking Start , pointing to All Programs , pointing to Accessories , pointing to System Tools , and then clicking Backup . If the Backup or Restore Wizard opens by default, click Advanced modeon the Welcome screen, and the Backup Utility dialog box opens, as shown below.
Click the Backup Wizardbutton. And follow the prompts. In the What to Backupdialog box, select Backup selected files, drives, or network data . In the Items to Backupdialog box, select the folders to be backed up. The network folders will be listed under My Network Places .
In the next window, you"re prompted for the type of backup (to a tape drive, a CD-RW drive, a network hard drive). In this case, I"m backing up to a shared folder on our server. When you"re done, the wizard summarizes your selections.
Click the Advancedbutton to make additional settings. A Normalbackup is appropriate under most conditions. In the How to Backupdialog box you"re offered an option to Verify data after backup . Be advised that checking this option does not constitute a true verification that the backup is good and, more importantly, restorable. The only real verification is to restore a selection of files to another location and actually look to be sure they"re good. Do this the first time you do a tape backup and repeat it several times a year.
Windows XP Backup, by default, creates a volume shadow copyof the volume being backed up. A volume shadow copy is a picture of the volume at a particular moment in time. That means a computer can be backed up while files are open and applications running. Files are not skipped during backup and you don"t need to schedule backups when the computers on your network aren"t being used. The volume shadow copy service allows applications to continue running uninterrupted on the actual volumes while a shadow copy is made. After the backup is completed, the shadow copy is deleted.
By default, Windows XP Professional uses available space on any NTFS volume to store a record of the differences between the original volume and the shadow copy volume. If enough disk space isn"t available, Windows XP Professional won"t be able to make a volume shadow copy and Backup skips open files. It"s possible that you"ll get an error message when enough space isn"t available. In that case, you can turn off the volume shadow copy service. In the Completing the Backup Wizard dialog box, click the Advancedbutton. Then select the Disable volume shadow copycheck box in the How to Backup dialog box. In the interests of efficiency, you can also turn off volume shadow copying if you are backing up just a few files or routinely back up when the computers on your network are not in use. You can only turn off Shadow Copy if System State is not part of backup.
In the When to Backupdialog box, you can set a time for the backup to run or click Set Scheduleto specify that the backup be performed at a particular time daily, weekly, or at other intervals.
Note : Each backup set is separately named so you can do a network backup on one schedule and a backup of your own computer on a different schedule.
Click the Finishedbutton and if you"ve opted to do the backup at once, the process will start. Otherwise the Backup program will close until the scheduled backup time.
Testing your backup is particularly essential with a tape backup. To test it: open the Backup program again and click the Restore Wizard . Select the backup and navigate to a file or files to be restored. On the summary screen, click the Advancedbutton. In the Where to Restoredialog box, select Alternate locationand specify where to restore the files. After the files have been restored, go to the location and check that the files are complete and uncorrupted. If they"re OK, your tape drive has passed the test. Just don"t forget to test again at regular intervals.
A backup is a good thing—a very good thing—but only to the extent that it"s both recent and restorable.
Sharon Crawford is a former editor now engaged in writing books and magazine articles. Since 1993, she has written or co–written two dozen books on computer topics. Her books includeWindows 2000 Pro: The Missing Manual, Windows 98: No Experience Required, andWindows 2000 Professional for Dummies (with Andy Rathbone).

推荐阅读