App Volumes agent interacts with mapped volumes using a system path to the volume, without mapping it to a drive letter.

Most of the modern applications are entirely compatible with this behavior. However, some of the applications might require a drive letter to access program or application files. To support such a situation, while maintaining the familiar user interface, App Volumes can hide the drive from Windows Explorer after it is mapped.

This behavior is configurable using the DriveLetterSettings registry value.

The value for DriveLetterSettings is in a hexadecimal format, and any number of flags might be combined to implement multiple parameters. For example, if you want to use the 0x00000001 and 0x00000008 flags as shown, the result is 0x00000009. Enter this as 9 because you only work with the significant digits.

Value

Description

0x0000001

DRIVELETTER_REMOVE_WRITABLE. Do not assign drive letter for writable volumes

0x0000002

DRIVELETTER_REMOVE_READONLY. Do not assign drive letter for AppStack volumes

0x0000004

DRIVELETTER_HIDE_WRITABLE. Hide drive letter for writable volumes

0x0000008

DRIVELETTER_HIDE_READONLY. Hide drive letter for AppStack volumes

The default registry value is 3. This means that for writable volumes, the drive letter is hidden, and for AppStack volumes, the drive letter is not assigned.