Microsoft Answers论坛上的一些用户报告说，当使用备份和还原工具 和USB外部驱动器在其 Windows 10 PC 上创建系统映像备份时，操作失败并出现连续和/或错误代码组合，即：0x807800C5和0x8078004F。在这篇文章中，我们将为这个问题提供最合适的解决方案。

准备备份集中其中一个卷的备份映像失败 (0x807800C5)

挂载的备份卷不可访问，请重试操作（0x8078004F）

系统映像备份^{(System Image Backup)}失败，错误代码 0x807800C5^{(Error Codes 0x807800C5)}和 0x8078004F

如果您遇到任何这些错误代码，您可以尝试我们推荐的解决方案，看看它们是否可以帮助您解决问题。

1. 暂时禁用安全^(Security)软件
2. 重新启动卷影复制
3. ^{(Create System Image)}使用PowerShell创建系统映像
4. 准备^(Prepare)外部驱动器以备份多个系统映像
5. 格式化外部驱动器
6. 使用第三方成像软件

让我们看一下关于列出的每个解决方案所涉及的过程的描述。

1]暂时^{(Temporarily)}禁用安全^(Security)软件

暂时禁用安全软件，然后尝试操作，看看是否有帮助。

2]重新启动卷影复制

打开服务管理器^{(Open Services Manager)}，找到卷影复制^{(Shadow Copy)}服务，右键单击它并选择重新启动^(Restart)。

现在试试看是否有帮助。

3]使用PowerShell创建系统映像^{(Create System Image)}

如果您在使用GUI创建系统映像备份时遇到这些错误代码，则程序可能出现故障。在这种情况下，您可以尝试在 Windows 10 上使用 PowerShell 创建系统映像。

4]准备^(Prepare)外部驱动器以备份多个系统映像

默认情况下，您只能在外部USB驱动器上创建一个系统映像。如果您有一台计算机的现有系统映像并为同一台计算机创建一个新系统映像，则新系统映像将覆盖现有系统映像。

因此，如果您在外部驱动器上已有系统映像并遇到这些错误代码，则可能由于某种原因系统无法覆盖现有系统映像。

在这种情况下，您可以按照我们帖子中的说明准备外部驱动器以允许备份多个系统映像^{(prepare the external drive to allow backup of multiple system images)}。

5]格式化外部驱动器

此解决方案要求您格式化外部驱动器^{(format the external drive)}，然后再次尝试系统映像备份。如果这不起作用，您可以尝试使用另一个USB驱动器。

6]使用第三方成像软件

如果此时仍无法正常工作，您可以使用任何第3 方映像、备份和恢复软件^{(3rd party Imaging, Backup and Recovery Software)}。

这些解决方案中的任何一个都应该适合您！

相关帖子^{(Related post)}：系统映像备份失败，Windows 上的错误 0x80780038^{(System Image Backup failed, Error 0x80780038 on Windows)}。

System Image Backup failed, Errors 0x807800C5 and 0x8078004F

Some users on the Microsoft Answers forum are reporting that when using the Backup and Rеstore Tool and a USΒ externаl drive to create a system image backυp on their Windows 10 PC, the operations fail with succession and/or a combination of error codeѕ viz: 0x807800C5 and 0x8078004F. In this post, we will offer the most suitable solutions to this issue.

There was a failure in preparing the backup image of one of the volumes in the backup set (0x807800C5)

The mounted backup volume is inaccessible, please retry the operation (0x8078004F)

System Image Backup failed, Error Codes 0x807800C5 and 0x8078004F

If you’re faced with any of these error codes, you can try our recommended solutions and see if any of them help you resolve the issue.

1. Temporarily disable the Security software
2. Restart Volume Shadow Copy
3. Create System Image using PowerShell
4. Prepare external drive to backup multiple system images
5. Format external drive
6. Use third-party imaging software

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Temporarily disable the Security software

Temporarily disable the security software and then try the operation and see if that helps.

2] Restart Volume Shadow Copy

Open Services Manager, locate Volume Shadow Copy services, right-click on it and select Restart.

Now try and see if that helped.

3] Create System Image using PowerShell

If you’re encountering these error codes using the GUI to create the system image backup, it’s possible the program is glitched. In this case, you can try creating the system image using PowerShell on Windows 10.

4] Prepare external drive to backup multiple system images

By default, you can only create one system image on an external USB drive. If you have an existing system image for a computer and are creating a new one for the same computer, the new system image will overwrite the existing one.

So, if you already have a system image on the external drive and encountering these error codes, it’s possible that for some reason the system is unable to overwrite the existing system image.

In this case, you can follow the instructions in our post to prepare the external drive to allow backup of multiple system images.

5] Format external drive

This solution requires you to format the external drive and then try the system image backup again. If that doesn’t work, you can try using another USB drive.

6] Use third-party imaging software

If nothing still works at this point, you can use any of the 3rd party Imaging, Backup and Recovery Software.

Any of these solutions should work for you!

Related post: System Image Backup failed, Error 0x80780038 on Windows.

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