I have modified /boot/qnxbasesmp.build and make a new IFS using mkifs qnxbasesmp.build /.boot/qnxbasesmp.ifs.
However the qnx box cannot reboot by shutdown, it will pause at shutdown daemons.
I noticed that this is caused by the failure of slaying devb-eide.

To speed up startup, I add a time before diskboot in build:

seedres
slogger -s128k
pci-bios -B
waitfor /dev/pci
devb-eide cam quiet 
waitfor /dev/hd0

This will be happen occasionally, especially after remake IFS.
Please help me get it solved. 
Thank you in advance.

Allen