[mythtv-users] RAID suggestions

[Brandon Sherman]

Well, if you don't care about your videos, RAID 0 will go the  
fastest.  For the best price/speed/integrity, a RAID 5 array will  
work best.
http://www.acnc.com/04_01_05.html can help you determine what kind of  
RAID array.  With RAID 5, the total storage space lost is equal to  
the number of drives as a percentage.  With a 5 drive array, you  
loose 20% of your disk space.

You could also do a RAID 0+1 setup which RAID 0 speed with RAID 1  
integrity but is harder to set up and maintain since it requires 4  
drives to work, and more to be effective.  RAID 5 only requires 3  
drives (but 4 are recommend at least).

Brandon

On Nov 15, 2005, at 10:31 PM, Mike wrote:

> After using MythTV for quite some time. I'm starting to think I  
> might want a raid controller to use with my 2 hitachi deskstars  
> (250GB)
>
> I'm sort of looking at a 3ware 7506-4LP but I hear the performance  
> isn't all that and its more for redudancy. I'm going for both size  
> and speed since it seems a lot of the wait is in the drive, plus I  
> want lots of storage. I have little faith in software raid  
> controllers and really want the whole process offloaded from the  
> CPU so it can do things like commflag. (hence the 3ware with good  
> linux support)
>
> Does anybody have any suggestions to get the most speed out of my 2  
> drives? Also, I am not opposed to buying 2 SATA II drives and a  
> 3ware SATA controller for the backend. Is it really that big of a  
> difference? Things seem slow with mythcommflag running, 3 shows  
> recording and trying to bring up the recorded programs from  
> mythweb. I plan on adding an HD-3000 to the mix which I hear I need  
> almost an entire systems resources by itself just to watch live  
> HDTV since it isn't HW encoded. And I prefer not using XvMC since  
> the only thing I've managed to do with it is make the picture look  
> worse and have the computer crash every couple of hours with it on.
>
> Any suggestions on the raid card and hardware configuration?
>
> Thanks
> -Mike
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