[mythtv-users] question about RAID

[David]

chris at cpr.homelinux.net wrote:

>On Mon, Jan 09, 2006 at 08:53:31PM -0500, Steve Adeff wrote:
>  
>
>>If I can add drives in after initial creation, I could add in more of my 
>>320gig drives I have with other media on them, increase write speed a bit and 
>>not worry about losing the other data as well.
>>    
>>
>
>You can't increase the number of active devices in a RAID-5 (mdadm) 
>array because the distribution of data and parity is set when the 
>array is first created.  To increase the capacity of the array you 
>would need to increase the capacity of all of the constituent 
>devices, "grow" the array to take up the extra space and then resize 
>the hosted filesystem.
>
>  
>
You're correct in production kernels - but FYI this feature is now
available - it's still experimental (so you need to patch) but the md
dev guy is working on it.

David