Ubuntu 11.04 server with RAID 1

[Sterpu Victor]

The initial test was on a 64 bit with 2 sata hdds and the problem was 
the error that I described.
I used 64 bit Ubuntu server 11.10 cd.

I did another test on a 32 bit computer with one ATA hdd and the RAID 
worked.
I had only one ATA hdd and I did many partitions on the same device. I 
coupled these partitions in raid array.
I used 32 bit Ubuntu server 11.10 cd.

What is the problem on the 64 bit machine?
I'm trying to migrate from Debian to Ubuntu for some time but for this 
reason I can't.
Thank you.

On 22.10.2011 21:38, Sterpu Victor wrote:
> Hello
>
> In can't install Ubuntu 11.04 server with RAID 1.
> The error is "Cannot install grub on /dev/sdb" and the system is not 
> bootable.
>
> I have 2 hdd's and each has 4 partitions rezulting 4 RAIDs.
> The final RAID partitions are swap, /boot, / and /tmp.
>
> After receiving the error I went to the console(ALT+F4) and tryed to 
> install grub manualy but the command grub-install is not available.
>
> How do I solve this?
> Thank you.
>