Problem in FAI CentOS installation and Grub

[Hannu T. Pysäys]

Hi,

I have a problem in FAI (4.2.2) CentOS 6.5 installation with software-raid.
Logs:
fai.log:CENTOS/40-install-grub FAILED with exit code 255.
shell.log:Can't match device: /dev/md0
shell.log:./CENTOS/40-install-grub: line 17: /dev/md0=/dev/sda: No such 
file or directory

Could you please help me to get right direction to get this installation 
work?

Best regards, Hannu