Help with Raid (mdadm) in Debian 7

arkanjo

Hi,
I try to make a NAS with raid using OpenMediaVault, OwnCloud and Plex Media Server.

but I using 2 USB disk Seagate with 3 TB in raid.

When try create received errors, and after researching it appears that is not the active raid in the kernel or module.
How do you do mdadm create and run? Less important to run the Mali Driver to install Kodi (XBMC).
I tried to recompile but do not know what I'm missing.

1. root@OrangePI:~/kernel/OrangePI-Kernel# ./build_linux_kernel.sh 2
   
2. Building kernel for OPI-2 () ...
   
3.   Configuring ...
   
4.   Building kernel & modules ...
   
5.   Error: KERNEL NOT BUILT.
   
6. root@OrangePI:~/kernel/OrangePI-Kernel#

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PS: Taking advantage, I am getting these errors
wdt_restart, write reg 0xf1c20cb0
in dmesg, how tidy not to fill the /var/log/messages