Files on a home computer that are compressed by using NTFS compression may not be backed up correctly by Windows Home Server
Note Any Windows Home Server backup that includes NTFS compressed files may have this issue.
Under certain circumstances, a compressed file may consume more disk space than the original file size. Some sections of a file may use less disk space after NTFS compression. However, other sections of a file may use more disk space after NTFS compression. If the compressed file uses more disk space than the original file, a small amount of data at the end of the file may be lost during the backup process. This data loss results in a corrupted file or a partially corrupted file, depending on the corresponding file types. The file types that may be affected by this issue include, but are not limited to, CAB, ZIP, JPG, and PNG.
After you install this update, NTFS compressed files are backed up correctly. However, backups that you created before you installed the update may still contain corrupted files if the backups used NTFS compression.
This update will also be available as an update on the Microsoft Windows Update Web site.
Note This update is replaced by Windows Home Server Power Pack 1.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Update informationThe following file is available for download from the Microsoft Download Center:
Download the update for Windows Home Server (KB950190) package now.
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
PrerequisitesTo apply this update, you must have the latest version of Windows Home Server Connector installed on the home computer.
Pre-installation requirementBefore you install this update, make sure that you are not running home computer backup.
Restart requirementAfter you apply this update, you do not have to restart the computer.
Update replacement informationThis update does not replace any other previously released updates.
File informationThe English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
|File name||File version||File size||Date||Time||Platform|
- Right-click the compressed hard disk or folder, and then click Properties.
- On the General tab, click Advanced to open the Advanced Attributes dialog box.
- In the Advanced Attributes dialog box, click to clear the Compress contents to save disk space check box, and then click OK.
After NTFS compression is turned off on a home computer, Windows Home Server will back up the newly uncompressed files on that home computer during the next backup to the Windows Home Server. If you want to back up a home computer immediately, right-click the Windows Home Server tray icon, and then click Backup Now.
You can also use the compact command to make sure that no files are compressed by using NTFS compression. To do this, use an account that has administrative credentials to open a Command Prompt window. Type the following command. Replace the disk placeholder with the disk letter of the disk on your home computer.
Determine whether you have compressed files that are not backed up correctlyTo determine whether you have any files on a home computer that are compressed by using NTFS compression and that may not have been backed up correctly, follow these steps:
- Use an account that has administrative credentials to open a Command Prompt window.
- Run the following command for each hard disk that is attached to the home computer that is backed up by Windows Home Server. Replace the disk placeholder with the disk letter of the hard disk.
- Carefully type the following command at the command prompt, and then press ENTER. This command creates a text file that is named disk.txt in a temporary directory. The file lists the file names of all files that are compressed on the hard disk.compact /s:disk:\ | findstr /c:" to 1 C " > %temp%\disk.txt
For example, run the following command for files on disk C:compact /s:C:\ | findstr /c:" to 1 C "> %temp%\C.txt
- Use the following command to view the file that you created in step a: notepad %temp%\disk.txtFor example, run the following command to view the file that you created in step a:
- Carefully type the following command at the command prompt, and then press ENTER. This command creates a text file that is named disk.txt in a temporary directory. The file lists the file names of all files that are compressed on the hard disk.
The Connector software for the Windows Home Server operating system connects your home computers to your home server. Windows Home Server then automatically backs up your home computer, monitors its health, and enables you to configure and to remotely administer Windows Home Server from your home computer.
Article ID: 950190 - Last Review: 01/16/2015 10:10:54 - Revision: 5.0
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