Boot time delay caused by
udev. Early after initscripts starts there is message saying
waiting for uevents to be processed and causing delay on boot, it seems that udev is looking if there is disc in dvd tray. After udev has found disc, boot process continues normally.
How to prevent udev dvd lookup at boot time?
Maybe there is some way to skip some udev related stuff and let boot process continue and then later instruct udev to do stuff that may cause some delay (delay in uevents, but not in main boot process, is acceptable after udev is initially loaded).