[Gllug] Large raid 5/5+0 setup

[Justin Perreault]

On Thu, 2009-06-18 at 08:59 +0100, Andy Millar wrote:
> > > I've started searching the net to get a better understanding about raid
> > > 5/5+0 and the hit I can expect on performance.
> 
> > > The purpose of my searching is to sort out my myth-tv needs. I am
> > > currently thinking that I would like to have 20 x 1TB SATA drives in a
> > > raid 5+0 configuration for my backend server
> 
> I have the joy of playing with a reasonable specified homebrew style
> storage server which doesn't seem too far off what you're after.
> 
> I run a:
> 
> - Intel Core(TM) i& 920 @2.67GHz
> - 16GB RAM
> - 3ware 9650SE-16ML 16 port SATA/SAS Raid Card with BBWC
> - 16x Seagate 1.5TB Drives

What motherboard is that running on?
I've been looking at an Antec 1200 ultimate gamer case, what does the
one you play with have?

> Configured in RAID6 with a hot spare, I get 17.69 TB usable space.

Are all the drives hot swapable?

> The rebuild time during light use for a single drive is approx. 6-8
> hours.
> 
> I've managed to get around 600MB/s read and 400MB/s write locally on
> this device when using large block sizes.

Seems like that should more than handle my concerns.

> I also seem to remember it costing around £4000-4500, which really isn't
> a bad price for the space -- even if you compare it to the low end
> "enterprise" storage arrays.

That is about 3 times the amount that I was currently looking at. I
think I was being over optimistic. :)

About how long ago was this bought?

I see there is a 24 port version of that card which I might go for. 

Any annoyances with maintaining this server?

Thanks for the great feedback and info so far.

Justin







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