[CentOS] Re: A question about RAID and partitions

[Scott Silva]

Scott Moseman spake the following on 5/22/2007 11:30 AM:
> On 5/22/07, Scott Silva <ssilva at sgvwater.com>
> wrote:
>>
>> > How do you create several RAID devices if you only have 2 drives?
>> > Is there a way to create virtual RAID sets?  That sounds too scary.
>>
>> You create raid devices over partitions that don't span the entire drive.
>>
> 
> Why would this be a configuration that someone would want to do?
> So you can have both a 0 (performance) and 1 (redundancy) on the
> same physical drives, depending on your partition?  Just seems odd.
> 
> Thanks,
> Scott
What if you wanted /boot and / to be on a raid1 for redundancy, but you wanted
a scratch directory on raid 0 for the speed, maybe for video editing or other
I/O intensive operation?
If you didn't care that the scratch directory failed on a drive fail, you
could get back and running with a reboot and re-creating the filesystem on the
scratch directory.

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