Partition is created and grub is installed as instructed in the thread. Also Grub is installed now.
should i make any config changes ( or not )in the /boot/grub/ directory? Number Start (sector) End (sector) Size Code Name 1 2048 7813119 3.7 GiB FD00 Linux RAID 2 34 2047 1007.0 KiB EF02 BIOS boot partition 3 27344896 1980469247 931.3 GiB FD00 Linux RAID 4 1980469248 2930276351 452.9 GiB FD00 Linux RAID 5 7815168 27344895 9.3 GiB FD00 Linux RAID root@nasbox:~# grub-install /dev/sdb Installation finished. No error reported.