Determines where the download package is run from under certain conditions.
Registry valueDefault valueNotesInstaller property
RunUncachedPermittedFastLAN0Works in conjunction with MaxPackageSizeFastLAN (which needs to contain a value value greater than zero). Values are:
  • 0 – do not run package from the distribution point.
  • 1 – run package directly from the distribution point if there is either insufficient disk space to create the cache, or the maximum package threshold is exceeded but the connection is fast (>500kbps).

To ensure that the un-cached mode works correctly, set the Program Environment Properties to include the Drive mode/Require drive letter option.
PERMITUNCACHED