在今天的帖子中，我们将尝试使用Windows^(Windows)计算机上的所有可用磁盘空间来解决WinPE 10中的^{(WinPE 10)}NTFS压缩问题。使用NTFS压缩需要在^(NTFS)CPU时间和磁盘活动之间进行权衡。在某些类型的情况和某些类型的文件中，压缩会更好地工作。

^(NTFS)WinPE 10中的^{(WinPE 10)}NTFS压缩使用所有可用磁盘空间

Windows使用的NTFS 文件系统具有称为^{(NTFS file system)}NTFS压缩的内置压缩功能。只需单击几下，您就可以压缩文件，从而减少它们在硬盘驱动器上占用的空间。最重要的是，您仍然可以正常访问这些文件。

Windows PE 或 WinPE是一个小型操作系统，用于安装、部署和修复适用于桌面版（家庭^(Home)版、专业版^(Pro)、企业版^(Enterprise)和教育^(Education)版）、Windows Server和其他Windows操作系统的Windows 10。^(Windows)

DISM 失败并出现错误 112

如果您尝试在系统上创建分区，然后尝试使用/C 开关来格式化分区以启用 NTFS 压缩，您可能会遇到此问题。

现在，当您在WinPE 10^{(WinPE 10)} x64 中创建可启动USB密钥并将“测试” WIM文件复制到USB密钥时，在测试系统上启动到WinPE并尝试运行以下命令：

dism /apply-image /imagefile:d:\test.swm /swmfile:d:\test*.swm /index:1 /applydir:c:\

DISM命令可能会失败并出现错误112。

在这里，他在测试系统上的分区是 C 盘，而U 盘^(USB)是 D 盘。

即使您在这种情况下使用 WinPE 5 x64，您也可能会遇到同样的问题。WIM文件被拆分以适应FAT32系统。日志文件位于 wpe5 和 wpe10 子文件夹中。

要解决此问题，Microsoft建议您不要通过使用NTFS压缩来格式化卷，而是通过在应用这些映像时指定/compact来使用^(dism)WOF 压缩。^{(WOF compression)}

WOF代表Windows 覆盖过滤器^{(Windows Overlay Filter)}。与本机NTFS文件压缩不同，Windows 覆盖过滤器^{(Windows Overlay Filter)}仅支持读取操作。这意味着它不需要对每个压缩块进行扇区对齐，因此可以将压缩数据更紧密地打包在一起。如果您打开文件进行写入，Windows 覆盖过滤器^{(Windows Overlay Filter)}只会解压缩整个文件，将其转回纯文件。

Windows 覆盖过滤器^{(Windows Overlay Filter)}可以利用过去 20 年开发的更新压缩算法，产生更好压缩比的算法可以在多个内核上并行运行，并且需要更少的CPU和内存进行解压缩。

这缓解了这个问题，并通过使用更有效的压缩算法使系统运行得更快。

DISM fails with error 112 when NTFS compression is enabled in WinPE 10

In tоday’s post, we will attemрt to resolve the iѕsue of NTFS compression in WinPE 10 using all available disk space on your Windows computer. Using NTFS compression іnvolνes a trade-off between CPU tіme and disk activity. Сompression will work better іn certаin typeѕ of situations and with certain types of files.

NTFS compression in WinPE 10 uses all available disk space

The NTFS file system used by Windows has a built-in compression feature known as NTFS compression. With a few clicks, you can compress files, making them take up less space on your hard drive. Best of all, you can still access the files normally.

Windows PE  or WinPE is a small operating system used to install, deploy, and repair Windows 10 for desktop editions (Home, Pro, Enterprise, and Education), Windows Server, and other Windows operating systems.

DISM fails with error 112

You may face this issue if you try to create a partition on a system and then try to format the partition by using the /C switch to enable NTFS compression.

Now when you create a bootable USB key in WinPE 10 x64 and copy the “test” WIM files to the USB key, boot into WinPE on the test system and try to run the following command:

dism /apply-image /imagefile:d:\test.swm /swmfile:d:\test*.swm /index:1 /applydir:c:\

The DISM command is likely to fail with error 112.

Here, he partition on the test system is drive C, and the USB key is drive D.

Even if you use WinPE 5 x64 in this scenario, you may experience the same issue. The WIM file is split to fit on a FAT32 system. The log files are in the wpe5 and wpe10 subfolders.

To work around this issue, Microsoft recommends that you do not format the volume by using NTFS compression and instead use WOF compression by specifying /compact to dism when you apply these images.

WOF stands for Windows Overlay Filter. Unlike native NTFS file compression, the Windows Overlay Filter supports only read operations. This means that it doesn’t need to sector-align each compressed chunk, so the compressed data can be packed more tightly together. If you open the file for writing, the Windows Overlay Filter just decompresses the entire file, turning it back into a plain file.

The Windows Overlay Filter can take advantage of newer compression algorithms developed over the past 20 years, algorithms that produce better compression ratios can be run in parallel on multiple cores, and which require less CPU and memory for decompression.

This mitigates the issue and also makes the system runs faster by using a more efficient compression algorithm.

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