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I have a ASUS computer and i'm trying to install ubuntu. I have 2 hard disk, so i installed ubuntu on the second one (where there is no windows 7..), format the partition of 100go in ext4 , and choose at boot sector the partition of the 1st HDD where it was written "windows loader" but had an error so i choose the root of the 1stHDD but still no choice at the boot of the computer, windows boot and no grub... How can i fix it?

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Firstly fix the Windows botloader, then fix grub do not install it on a partition on the second disk (as you did) install it ON the disk. – Uri Herrera Apr 4 '12 at 19:02
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It's probably about the boot-order of devices in your BIOS. Check it to put your second hard-disk as the first checked at start-up.

You should try to repair grub :

For those who don't speak french :

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In the BIOS, I can see 2HDD but they're both the same, apparently it's because of RAID.. And if i do so, the computer will always boot on linux as it does actually with windows, no? – Gualano Apr 4 '12 at 19:05
No, it won't because Linux will show GRUB to let you choose the operating system. "it's because of RAID" You're using raid but you put an OS on only one disk ? Is it possible ?? You sure about the RAID part ? – Bahaïka Apr 4 '12 at 19:08
No, not sure about the raid part but sure about the fact that the second HDD is not available in bios choices.. – Gualano Apr 4 '12 at 19:09
Set the second hard disk as the first disk in the hard-disk panel, your BIOS is probably ordering items by type, and you can choose one item of each type. Look at that. For the raid, you're probably not using it. – Bahaïka Apr 4 '12 at 19:11
I'm gonna try it. But i choose the root of the 1st HDD at amorcage sector, so grub should be installed there, no? (sorry for the english, i'm french..) – Gualano Apr 4 '12 at 19:14

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