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It’s Freeware, designed for tier one IT departments. We can offer this a freeware to IT departments and users, because we are confident that as your organizations IT needs grow you will be confident in using our more advance PC restore solutions throughout your enterprise. Check out our products comparison chart. Reduce PC Maintenance Cost.
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What you should know about Volume Shadow Copy/System Restore in Windows 7 & Vista (FAQ) « Hope This Helps. What is volume shadow copy? Volume Shadow Copy is a service that creates and maintains snapshots (“shadow copies”) of disk volumes in Windows 7 and Vista.
It is the back- end of the System Restore feature, which enables you to restore your system files to a previous state in case of a system failure (e. Volume Shadow Copy maintains snapshots of entire volumes. By default, it is turned on for your system volume (C: ) and protects all the data on that volume, including all the system files, program files, user settings, documents, etc. How is this different from what’s in Windows XP? In Windows XP, System Restore does not use the Volume Shadow Copy service. Instead, it uses a much simpler mechanism: the moment a program attempts to overwrite a system file, Windows XP makes a copy of it and saves it in a separate folder.
External links. Guide to scheduling Complete PC Backup using WBAdmin; NTBackup Restore utility for Windows Server 2008; Backup Basics from Microsoft.
Possible Duplicate: How can I restore my system from WIM files? How can I restore my system from WIM files?
- If you are thinking of installing an application but aren’t quite sure what it’s going to do to your computer, I would absolutely recommend creating a restore.
- Shadow Copy (also known as Volume Snapshot Service, Volume Shadow Copy Service or VSS) is a technology included in Microsoft Windows that allows taking manual or.
- How to Import (Restore) All Tasks in Bulk Using Task Scheduler in Windows? Recently we posted a tutorial about importing and exporting tasks using Task Scheduler in.
- In some scenarios, you may.
In Windows XP, System Restore does not affect your documents – it only protects files with certain extensions (such as DLL or EXE), the registry, and a few other things (details). It specifically excludes all files in the user profile and the My Documents folder (regardless of file extension). When are the shadow copies created? Volume shadow copies (restore points) are created before the installation of device drivers, system components (e. Direct. X), Windows updates, and some applications. In addition, Windows automatically creates restore points at hard- to- predict intervals. The first thing to understand here is that the System Restore task on Vista and 7 will only execute if your computer is idle for at least 1.
AC power. Since the definition of “idle” is “0% CPU usage and 0% disk input for 9. As you see, the frequency with which automatic restore points are created is hard to estimate, but if you use your machine every day on AC power and nothing prevents it from entering an idle state, you can expect automatic restore points to be created every 1- 2 days on Windows Vista and every 7- 8 days on Windows 7. Of course, the actual frequency will be higher if you count in the restore points created manually by you and those created before software installations. Here’s a more precise description: By default, the System Restore task is scheduled to run every time you start your computer and every day at midnight, as long as your computer is idle and on AC power. The task will wait for the right conditions for up to 2. These rules are specified in Scheduled Tasks and can be changed by the user. If the task is executed successfully, Windows will create a restore point, but only if enough time has passed since the last restore point (automatic or not) was created.
While you may be unable to create a system restore points manually, it is quite possible however that the Automatic Restore Points may continue to get created, but.
On Windows Vista the minimum interval is 2. Windows 7 it is 7 days. As far as I know, this interval cannot be changed. What cool things can I do with Volume Shadow Copy? If your system malfunctions after installing a new video card driver or firewall software, you can launch System Restore and roll back to a working system state from before the installation. If you can’t get your system to boot, you can also do this from the Windows Setup DVD. This process is reversible, i.
You can open it (in read- only mode) or copy it to a new location. If you accidentally delete a file or folder, you can right- click the containing folder, choose Restore previous versions, and open the folderas it appeared at the time a shadow copy was made (see screenshot below). All the files and folders that you deleted will be there! Note: While the Volume Shadow Copy service and System Restore are included in all versions of Windows Vista, the Previous versions user interface is only available in Vista Business, Enterprise and Ultimate. On other Vista versions, the previous versions of your files are still there; you just cannot access them easily.
The Previous versions UI is available in all versions of Windows 7. It is not available in any version of Windows 8. Is Volume Shadow Copy a replacement for versioning? No. A versioning system lets you access all versions of a document; every time you save a document, a new version is created. Volume Shadow Copy only allows you to go back to the moment when a restore point was made, which could be several days ago. So if you do screw up your dissertation, you might have to roll back to a very old version.
Is Volume Shadow Copy a replacement for backups? No, for the following reasons: Shadow copies are not true snapshots. When you create a restore point, you’re not making a new copy of the drive in question — you’re just telling Windows: start tracking the changes to this drive; if something changes, back up the original version so I can go back to it. Unchanged data will not be backed up. If the data on your drive gets changed (corrupted) for some low- level reason like a hardware error, VSC will not know that these changes happened and will not back up your data.
In particular, Windows 7 will only create an automatic restore point if the most recent restore point is more than 7 days old. On Windows Vista, the minimum interval is 2. System Restore task will only run if your computer is on AC power and idle for at least 1.
There is no guarantee that a suitable shadow copy will be there when you need it. Windows deletes old shadow copies without a warning as soon as it runs out of shadow storage. With a lot of disk activity, it may even run out of space for a single shadow copy. In that case, you will wind up with no shadow copies at all; and again, there will be no message to warn you about it. How much disk space do Volume Shadow Copies take up? By default, the maximum amount of storage available for shadow copies is 5% (on Windows 7) or 1. Vista), though only some of this space may be actually allocated at a given moment.
You can change the maximum amount of space available for shadow copies in Control Panel . The 5% of disk space that it gets by default is usually enough to store several snapshots of the disk in question. How is this possible?
The first thing to understand is that volume shadow copies are not true snapshots. When a restore point is created, Volume Shadow Copy does not create a full image of the volume. If it did, it would be impossible to store several shadow copies of a volume using only 5% of that volume’s capacity.
Here’s what really happens when a restore point is created: VSC starts tracking the changes made to all the blocks on the volume. Whenever anyone writes data to a block, VSC makes a copy of that block and saves it on a hidden volume. So blocks are “backed up” only when they are about to get overwritten. The benefit of this approach is that no backup space is wasted on blocks that haven’t changed at all since the last restore point was created. Notice that VSC operateson the block level, that is below the file system level. It sees the disk as a long series of blocks.
Suppose it’s Wednesday and your system has two shadow copies, created on Monday and Tuesday. Now, when you overwrite a block, a backup copy of the block is saved in the Tuesday shadow copy, but not in the Monday shadow copy. The Monday copy only contains the differences between Monday and Tuesday. More recent changes are only tracked in the Tuesday copy.
In other words, if we were to roll back an entire volume to Monday, we would take the volume as it is now, “undo” the changes made since Tuesday (using the blocks saved in the Tuesday shadow copy), and finally “undo” the changes made between Monday and Tuesday. So the oldest shadow copy is dependent on all the more recent shadow copies. When I delete a 7. MB file, does VSC add 7. MB of data to the shadow copy? No. When you delete a file, all that Windows does is remove the corresponding entry (file name, path, properties) from the Master File Table.
The blocks (units of disk space) that contained the file’s contents are marked as unused, but they are not actually deleted. So all the data that was in the file is still there in the same blocks, until the blocks get overwritten (e. Because it operates on the block level, it does not have to back up anything, as the blocks occupied by the file are unchanged! The only thing it has to back up is the blocks occupied by the Master File Table, which has changed. If you then start copying other files to the same disk, some of the blocks formerly occupied by the 7.
MB file will get overwritten. VSC will make backups of these blocks as they get overwritten. If VSS is constantly backing up blocks of data that get overwritten, what actually happens when a restore point is created if data is automatically being backed up anyway? Not much — VSS simply starts backing up the data to a new place, while leaving the “old place” there (at least until it runs out of space).
Now you have two places to which you can restore your system, each representing a different point in time. When you create a restore point, you’re simply telling VSS: “I want to be able to go back to this point in time”. Note that it’s a mistake to think that VSS is backing up every change you make! It only backs up enough to enable you to go to a specific point in time.
Here’s an example scenario to clear things up: You create a file (version #1)You create a restore point. You change the file (resulting in version #2) — VSS backs up version #1.
A week later, you change the file again (resulting in version #3) — VSS doesn’t back anything up, because it already has version #1 backed up. As a result, you can no longer go back to version #2. You can only go back to version #1 — the one that existed when the restore point was created.(Note that actually VSS doesn’t operate on files but on blocks, but the principle is the same.)What are the security implications of Volume Shadow Copy?
Suppose you decide to protect one of your documents from prying eyes. First, you create an encrypted copy using an encryption application. Then, you “wipe” (or “secure- delete”) the original document, which consists of overwriting it several times and deleting it.