Fix for: CentOS 6 won’t boot/load GRUB on software RAID /dev/md0

If you’ve just installed CentOS 6 on software RAID and it won’t boot off /dev/md0, try the following:

1. Using your CentOS install media, boot in to rescue mode

2. Once you are booted in to rescue mode, select the “start shell” option

3. Enter the following command:

chroot /mnt/sysimage

4. Re-install GRUB (/dev/md0 may be different for you depending on how you configured your software RAID)

grub-install /dev/md0

5. Reboot

The above commands helped me fix this issue on CentOS 6.3 x86_64 minimal.

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About Author: Curtis K

Hi! My name is Curtis, and I am the author of CentOS Blog. Please feel free to comment with any suggestions, feedback or questions!