Windows Server Troubleshooting - Junction Point

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Major Topics
File System
Active Directory
Other Topics
Boot Records
Junction Point
Dynamic Disk
MFT Metadata
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Junction Points

Junction Points provide a mechanism to create logical folders that take the user to other folders possibly in other volumes. It provides a way to logically reorganize the tree structured file system without physically moving the files.

The following diagram shows 3 Junction Points represented by the yellow folders. The first points to another volume and is created with the Disk Management console. The other junction points created with the LINKD command can link to other folders on other or the same volume.

What an administrator creates                       What a user sees

C:   D: E:  
link to volume use Disk Management console    

 link to folder

use linkd


use linkd      

Junction points are created with empty folders. Any valid local pathname can be mounted at the junction point. With junction points, local volumes do not need drive letters because they can be accessed through a junction point folder. This eliminates the volume restriction limited by the 26 letter alphabet. Drive letters can be removed from a volume by using the Disk Management console.

Junction Point Problems

The LINKD command can establish Junction Points where a folder links to a different folder on a different volume. Do not create loops by linking a subfolder back to the original volume. If you create loops with Junction Points, programs that do subfolder searches and backups will repeatedly visit the same folder as they loop through the Junction Point links.

Never allow users to see the same data through two different paths. This will confuse users and they may mistake the different paths as redundant data. If you set a Junction Point to a volume root, use the Disk Management console to remove the drive letter.

Keyboard Exercise

Use the Disk Management console to create a Junction Point. Select a volume, right-click, and select Change Drive Letter and Paths to get the following dialog. Press the Add button to specify the path of the Junction Point.