[CentOS] CentOS 6.2 software raid 10 with LVM - Need help with degraded drive and only one MBR

Digimer linux at alteeve.com
Fri Mar 2 14:39:37 EST 2012


On 03/02/2012 01:01 PM, m.roth at 5-cent.us wrote:
> Digimer wrote:
> <snip>
>> Boot from a live CD using the CentOS 6.2 install media. Once booted:
>>
>> <bash># grub
>> <grub> root (hd0,0)
>> <grub> setup (hd0)
>> <grub> root (hd1,0)
>> <grub> setup (hd1)
>> <grub> root (hd2,0)
>> <grub> setup (hd2)
>> <grub> quit
>> <bash># reboot
>>
>> This assumes that grub sees the drives at '0, 1 and 2' and the boot
>> partition is the first on each drive. If it is, when you type 'root
>> (hdX,0)' it should report that a file system was found. The 'setup
>> (hdX)' will tell grub to write the MBR to the specified disk.
> 
> THANK YOU! I could have used that once or twice, and had no idea that grub
> could create a std. MBR.
> 
>         mark

I've run into this a few times now where RAID'ed /boot doesn't have the
MBR written to all members. I've now gotten into the habit of running
this after OS install. I should file a bug with upstream...

-- 
Digimer
E-Mail:              digimer at alteeve.com
Papers and Projects: https://alteeve.com


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