[CentOS] preferred software RAID 10?

Rudi Ahlers Rudi at SoftDux.com
Thu Jul 17 21:10:48 UTC 2008


John R Pierce wrote:
> Rudi Ahlers wrote:
>> And then, how do I setup the partitioning? Do I setup /boot on a 
>> separate RAID "partition"? If so, what happens if I want to replace 
>> the 1st 2 HDD's with bigger ones?
>
>
> each partition is raided seperately with mdadm.... you could make the 
> whole thing one LVM partition thats raid10, then use LVM to dice it up 
> into file systems.
>
> if you have 4 drives and are doing software raid10, you won't be 
> swapping drives with different sizes without a WHOLE lotta pain.
Ok, so how do I do this? Let's say I have 4x 160GB HDD's now, and plan 
on replacing them with 4x 500GB HDD's in the future?

What setup would help with a upgrade in the future?
>
> /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?

-- 

Kind Regards
Rudi Ahlers

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




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