[CentOS] Lost raid when server reboots

Hi all,

I have setup a raid1 between two iscsi disks and mdadm command goes well. Problems starts when i rebooted the server (CentOS 5.4 fully updated): raid is lost, and i don't understand why.

"mdadm --detail --scan" doesn't returns me any output. "mdadm --examine --scan" returns me:

ARRAY /dev/md0 level=raid1 num-devices=2 UUID=9295e5a2:b28d4fbd:b61fed29:f232ebfe

and it's ok. My mdadm.conf is:

DEVICE partitions ARRAY /dev/md0 level=raid1 num-devices=2 metadata=0.90 UUID=9295e5a2:b28d4fbd:b61fed29:f232ebfe devices=/dev/iopsda1,/dev/iopsdb1 MAILADDR root

mdmonitor init script is activated.

Why md0 is not activated when I reboot this server? How can I do this persistent between reboots??

Many thanks.