how to do update firmware

1.windows/Linux mode
Thru browser to update *.ima to upgrade

2.DOS mode
boot to DOS mode
  a. execute ufw.bat after bmc reset
  b. execute usdr.bat and ufru.bat 
  c. after flash done , please remove your AC power and reboot

while flashing firmware, please must keep the power always on, 
Do not interrupt or firmware block will crash.