HP t5630 - Thin Client Quick Reference Manual page 56

If the flash device has enough memory, the update client starts the download of the WinPE image,
modifies the boot loader to boot to WinPE in the next system restart, and then restarts the system to
continue to the WinPE phase.
Once WinPE is loaded, IBRPE is spawned to image the system's flash drive using the selected image
from the FTP share. When the imaging completes, IBRPE automatically restarts the system to enter the
FBA phase.
48 Chapter 5 Control Panel Extended Selections