[CentOS] preferred software RAID 10?

Sat Jul 26 10:19:14 UTC 2008
Rudi Ahlers <Rudi at SoftDux.com>

Ross S. W. Walker wrote:
> Kai Schaetzl wrote:
>   
>> Rudi Ahlers wrote on Thu, 17 Jul 2008 23:10:48 +0200:
>>
>>     
>>>> /boot shouldn't be mirrored, as the BIOS won't know how to boot it. 
>>>> leave /dev/sdb1 the same size as /dev/sda1 and call it /boot2 and try 
>>>> to remember to copy /boot to /boot2 each time you update the kernel.
>>>>         
>>> I understand this, but how do you boot from /boot2 on the second HDD if 
>>> the 1st have failed?
>>>       
>> You don't (*). I don't understand John's advice here. There is no problem 
>> md mirroring /boot. You just need to install grub a second time on the 
>> other disk. For that you have to boot from it. (I think I also did it 
>> successfully without booting from the other disk in the past, but last 
>> time I tried it it didn't want to work like I remembered it should.)
>>
>> (*) Anyway, you would boot from a Rescue CD or such and rename it ...
>>     
>
> Yes, no problems, I had /boot mirrored across 4 drives (NAS box) and
> grub installed on each.
>
> If you use labels for /boot in fstab you don't even need to edit fstab
> from a rescue CD, just remove the failed first drive and boot.
>
> -Ross
>
> _____________________________________________________________________
Can you please explain this to me?

I've never used labels before, so if you could maybe show me a sample of 
how it's setup?

-- 

Kind Regards
Rudi Ahlers

Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff


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