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Old 04-12-2012, 09:36 PM
aurfalien
 
Default centos 6.2 md0 boot - no boot actually - FIXED

On Apr 11, 2012, at 8:20 PM, Ljubomir Ljubojevic wrote:

> On 04/12/2012 12:57 AM, Patrick Lists wrote:
>> On 04/12/2012 12:46 AM, aurfalien wrote:
>>> Hi all,
>>>
>>> Taken from this link;
>>>
>>> https://www.centos.org/modules/newbb/print.php?form=1&topic_id=34988&forum=55&order=ASC &start=0
>>>
>>> Seems like I am having the same issue.
>>>
>>> I assigned my boot loader to be on /dev/md0 rather then the default of /dev/sda1
>>
>> Not sure if this is valid for CentOS but on Fedora 15 I had to set the
>> metadata to version 0.90 when creating the /boot array. Without it (so
>> using metadata version 1.0 on /dev/md0 aka /boot) it would not boot.
>>
>
> Patrick, you are spot one. This is a must, and default for CentOS is 1.2
> I think.
>
> There is no conversion, you can only backup data from partition on md0
> and recreate md0 with:
>
> mdadm --create /dev/md9 --level=1 --raid-disks=2 /dev/sdj1 /dev/sdl1
> --metadata=0.90
>
> return data and reinstall grub on sda AND sdb.


While this most likely works, I went a diff route.

Based on this article which is Cliff noted below, I was able to get it working.

http://bugs.centos.org/view.php?id=5400

The latest dracut fixes the issue but I rebuilt initramfs to be safe.

So my order of operation;

1 - install Centos 6.1 with a software raid 1 config then rebooted of course
2 - yum update
2 - cd /boot
3 - mv initramfs-2.6.32-220.7.1.el6.x86_64.img initramfs-2.6.32-220.7.1.el6.x86_64.img.O
4 - mkinitrd /boot/initramfs-2.6.32-220.7.1.el6.x86_64.img 2.6.32-220.7.1.el6.x86_64
5 - reboot


Hope this helps any futures comrades in arms.

- aurf
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