Added HowTo for Software RAID

[Mark Doe]

Chris Turner wrote:

> On 07/30/11 12:03, Mark Doe wrote:
>> I just added a small software RAID howto with natacontrol command. please
>> help to get rid of the typos and male it more complete - thanks
> 
> Thanks for the contribution - a good overview to start!
> 
> my (personal) thoughts:
> 
> Think the part about checking the source code for other options can be
> nixed - IIRC I don't think the raid5 code actually works but the header
> bit is a placeholder -
> 
> checking src/sys/dev/disk/nata/ata-raid.c seems to confirm this - perhaps
> someone has other ideas?
> 
> so suggesting people deviate from the 'official' documentation is probably
> a bad idea

maybe the official documentation is incomplete. I can confirm that creating 
a RAID5 worked for me. In the source code it's not disabled (i dont know 
C/C++, so please correct me) from what I could see. 


> also:
> 
> might want to test/add a section about removing/hotswapping drives and
> rebuilding the array to 'complete the picture'
> 

definetely, I am going to complete the guide on the week-end with rebuilding 
the array, etc as you suggested.

thanks


> </2c>
> 
> - Chris