Can't install GRUB

[Paolo]

New server based on CentOS 6.3 x64.
2 SATA disk already previously used for testing porpouse (W7 and Linux).
Configuration with RAID 1 SW
Already installed a similar config to this and similar servers (Fujitsu 
Siemens Econel 100s2)

I can install without problem, but no way to boot the system. Really, if I 
use the search Legacy options ... from the SuperGrub2Disk I can boot and 
use the installed system like usually I do with similar systems.
But no way for me to boot directly from the local disks.

Reinstalled 3 times recreating/reformatting partitions
Used "bootrec.exe /FixMbr" from Win 7 DVD to clean the boot sectors

Below what I think can be useful:


# grub-install /dev/sda
The file /boot/grub/stage1 not read correctly.

# grub-install /dev/sdb
The file /boot/grub/stage1 not read correctly.

# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/md1              64506648   2199496  59030408   4% /
tmpfs                  1961908         0   1961908   0% /dev/shm
/dev/md0                237991     33594    192110  15% /boot
/dev/md2             1032121980    204132 979489108   1% /home

# file -s /dev/sda
/dev/sda: x86 boot sector; partition 1: ID=0xfd, starthead 32, startsector 2048, 
2097152000 sectors; partition 2: ID=0xfd, starthead 254, startsector 2097154048, 
131072000 sectors; partition 3: ID=0xfd, active, starthead 254, startsector 2228226048, 
491520 sectors, code offset 0xc0, OEM-ID "      м", Bytes/sector 190, 
sectors/cluster 124, reserved sectors 191, FATs 6, root entries
185, sectors 64514 (volumes <=32 MB) , Media descriptor 0xf3, sectors/FAT 20644, 
heads 6, hidden sectors 309755, sectors 2147991229 (volumes > 32 MB) , physical drive 
0x7e, dos < 4.0 BootSector (0x0)

]# file -s /dev/sdb
/dev/sdb: x86 boot sector; partition 1: ID=0xfd, starthead 32, startsector 2048, 
2097152000 sectors; partition 2: ID=0xfd, starthead 254, startsector 2097154048, 
131072000 sectors; partition 3: ID=0xfd, active, starthead 254, startsector 2228226048, 
491520 sectors, code offset 0xc0, OEM-ID "      м", Bytes/sector 190, 
sectors/cluster 124, reserved sectors 191, FATs 6, root entries
185, sectors 64514 (volumes <=32 MB) , Media descriptor 0xf3, sectors/FAT 20644, 
heads 6, hidden sectors 309755, sectors 2147991229 (volumes > 32 MB) , physical drive 
0x7e, dos < 4.0 BootSector (0x0)


# fdisk -l

Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x52b32024

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      130542  1048576000   fd  Linux raid autodetect
/dev/sdb2          130542      138701    65536000   fd  Linux raid autodetect
/dev/sdb3   *      138701      138732      245760   fd  Linux raid autodetect

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x0003e650

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1      130542  1048576000   fd  Linux raid autodetect
/dev/sda2          130542      138701    65536000   fd  Linux raid autodetect
/dev/sda3   *      138701      138732      245760   fd  Linux raid autodetect
Disk /dev/md1: 67.1 GB, 67107745792 bytes
2 heads, 4 sectors/track, 16383727 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000


Disk /dev/md2: 1073.7 GB, 1073740640256 bytes
2 heads, 4 sectors/track, 262143711 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000


Disk /dev/md0: 251 MB, 251645952 bytes
2 heads, 4 sectors/track, 61437 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000


Thanks for hints/help

Regards, P.