![]() Configuring Volume Shadow Copy on Windows Server 2. Purchase and download the full PDF and e. Pub versions of this e. Book only $9. 9. 9Windows Server 2. Volume Shadow Copy is a mechanism whereby the contents of shared folders can be automatically backed up at pre- determined intervals to a shadow volume. Once implemented, shadow copy will backup the previous 6. Disk Cleanup and Disk Defragmenting. After the installation and optimization of Windows, it is time to clean up the unnecessary files of the hard disk. In addition to restoring individual files to a previous version, shadow copy also provides the ability to restore an entire volume. Ordinarily, if a file is currently open or locked by an application, tools such as Windows Backup will fail to backup the file. Shadow copy aware backup tools are, however, able to avoid this problem by using the Volume Shadow Copy Service API. First and foremost the shared folders which are to be shadowed need to be identified. ![]() Secondly, a location for the shadow to be stored must be allocated. This can reside either on the same volume as the shared folders, or on a completely different volume or disk drive. Even before any data is shadowed, the shadow copy system requires 3. MB of available space. The total amount of space required will depend on the size of the shared folder which is to be shadowed and the frequency and extent to which the files are likely to change (since shadow copy will only take new snapshots of files which have changed since the last snapshot). Finally, the time and frequency of the volume snapshots needs to be defined. By default, Shadow Copy performs a snapshot twice a day at 7: 0. Once configured on a volume, all shared folders residing on that volume will automatically be shadowed. Shadow Copy can be configured either graphically using the Computer Management tool or via the command prompt. Command- line configuration of Shadow Copy will be covered in a later section of this chapter. ![]() ![]() This section will focus on Computer Management configuration. Once invoked, select Storage - > Disk Management from the tree in the left panel to display the disk and volume information for the local system. In the graphical view, right click on a volume and select on Properties to launch the properties dialog. In the properties dialog, select the Shadow Copy tab to display the Shadow Copy properties as illustrated in the following figure. A useful shortcut to access the Shadow Copy property panel is to run vssuirun from a command prompt with elevated privileges. Select the volume in this list for which Shadow Copy is to be enabled. With the volume selected click on the Settings button to display the following Shadow Copy Settings dialog box. WIN2. 8BOX< /google>. In the Located on this volume specify the volume on which the shadow copies are to be stored. I/O subsystem. Vista modifies the behavior of asynchronous I/O operations. With the new asynchronous I/O APIs, a thread, different from the one that issued the I/O.This can be either the current volume or a different volume on the system. The Details button displays free and total disk space information for the currently specified volume. Once a suitable volume for the shadow copies has been selected the maximum size to be made available for the shadow copies may be defined. This can either be set to Maximum size which will use all available space on the specified volume, or capped to a specific size (keeping in mind that a minimum of 3. MB is required for the shadow storage volume even before any snapshots are taken). Shadow Copy uses a differential approach to backing up files in that only files that have changed since the last snapshot are copied. For certain files, Shadow Copy also only copies the part of the file that has changed, rather than the entire file. As such, it is not necessary to reserve 6. By default, Windows configures two snapshots each day (at 7: 0. To remove a currently defined snapshot, select it from the drop down list and click on Delete. To modify a run, select it from the drop down list, modify the settings in the lower section of the dialog and click on OK. ![]() How VSS-based backup works. A Volume Shadow Copy Service-based backup uses two different methods to create shadow copies: Clone. A clone is a full, synchronized copy. The Windows Volume Shadow Copy Service exists to produce clean snapshots of disk volumes, and to create shadow copies of data or files that are consistent, readable. ShadowExplorer allows you to browse the Shadow Copies created by the Windows Vista / 7 / 8 / 10 Volume Shadow Copy Service. It's especially thought for users. If you don’t have an offsite cloud storage plan (and you really should), Google’s newest update to its cloud storage service Google Drive is ready to fix your. Note that snapshots can also be configured to occur at user logon, system startup and even when the system is idle. In fact, Windows Server 2. It is important to keep in mind, however, that there are disadvantages to running a shadow copy too frequently. Firstly, shadow copies are resource intensive tasks, especially on large volumes where many files are subject to frequent changes. Repeated snapshots during periods when the server is heavily utilized may well degrade overall system performance. Secondly, it is important to keep in mind that Shadow Copy retains the last 6. Therefore, if a snapshot is run every hour, the oldest restore point available to a user will be approximately two and half days in the past. If, on the other hand, snapshots are taken twice a day, the user will have the luxury of restoring a file from a point as much as 3. It is important, therefore, to strike a balance between longevity and frequency. Click OK once again in the Settings dialog to return to the Shadow Copy properties panel. At this point, the volume for which a schedule has been defined will have a small clock image superimposed over the volume icon and will indicate that 0 bytes of shadow copy storage have been used. The next step is to enable shadow copies on the volume by selecting the volume from the list and clicking on the Enable button. The volume in the list will update to display the date and time of the next scheduled copy and provide a summary of the current level of storage space used for the shadow copies. Once loaded, select the desired volume followed by a snapshot from which to restore from the Shadow copies of selected volume list and click on the Revert Now.. This will revert all shared folders on the selected volume to their state at the point that the selected shadow copy was made. For example, to delete the oldest shadow snapshot. C: \Windows\system. Volume Shadow Copy Service administrative command- line tool. C) Copyright 2. 00. Microsoft Corp. Note that the revert cannot be performed if open file handles exist on the volume (the /Force. Dismount parameter is available but its use is not recommended since it can result in lost data. C: \Windows\system. Assuming there are no existing shapshots, the following example will disable shadow copy on the volume represented as the e: drive. Restoring Shadow Copy Snapshots from Clients. Once shadow copy has been configured for volumes on the server, the next step is to learn how to access the previous version of files from client systems. This is achieved using a feature of Windows Server 2. ![]() Windows Vista called Previous Versions. Once the desired network drive or shared folder is visible, right click on it and select Restore Previous Versions (or just Previous Versions on Windows Vista). Once selected, the Properties dialog box will appear with the Previous Versions tab pre- selected as illustrated in the following figure. As shown in the previous figure, the Previous Versions property page lists the previous versions of the shared folder that are available for restoration. A number of options are available for each shadow copy snapshot listed in the properties dialog. Open will open the folder in Windows Explorer so that individual files and sub- folders can be viewed and copied. Finally, Restore.. As outlined in the warning dialog, this action cannot be undone once performed.
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