If Citrix AppLayering Agent is installed on the Image, BIS-F does something different describes in this chapter. Depending on the current Layer (OS, Platform, Application Layer) and if BIS-F runs inside / or outside the ELM, BIS-F detects the current Layer or ELM Mode and handles it accordingly.
Preparation:
BIS-F replaces need to run “Layer Finalize” running the following commands
Prepare AppLayering – List and remove unused network devices > UniService.exe -G
Prepare AppLayering – Check System Layer integrity > UniService.exe -L
BIS-F checks the results of the Layer integrity from the UniService Logfile, containing “Layer finalize is allowed”
before proceeding, otherwise BIS-F stops with an error message and you must check the log for further information, mostly a reboot
is necessary to fix the issue.
The following table Shows the AppLayering Matrix.
| Layer | AppLayering RunMode: Published image, all normal filtering takes place | AppLayering RunMode: not used | AppLayering RunMode: Editing the OS Layer, no filtering takes place | AppLayering RunMode: Editing any app or platform layer |
| 1 | 2 | 3 | 4 | |
| OS Layer | DiskMode = UnmanagedAppLayering | |||
| Platform-Layer | DiskMode = VDAPrivateAppLayering | |||
| Application-Layer | DiskMode = UnmanagedAppLayering | |||
| Outside ELM | DiskMode = ReadWriteAppLayering |
With this above combinations, BIS-F can hande App- and Platform Layer different if needed
Outside ELM:
This reference to the following KB Article Citrix App Layering 4.x: PVS Connector (BootPrivate)
DiskMode:
The DiskMode is a BIS-F own Feature, that are describes here
RunMode:
The App-Layering RunMode is getting from the Registry:
KEY_NAME=”HKEY_LOCAL_MACHINE\System\CurrentControlSet\services\unifltr”
VALUE_NAME=RunMode
If both AppLayering & PVS Target Device driver are installed, BIS-F skips the conversion to PVS vDisk with P2PVS / ImagingWizard.
Personalization:
During BIS-F Personalization, triggered from BIS-F scheduled task created during Preparation, the current Layer will be detected:
In the OS-Layer the Windows Update Service will be started
Redirection Matrix:
The Return Code below will be written also to the BIS-F Logfile