Re: Linux SATA RAID FAQ

[J. Ryan Earl]

Willy Tarreau wrote:

> I like it. It's fairly simple. I'm always amazed how many people do really
> believe that these cards provide hardware RAID !!! The problem is when you
> ask a reseller to add a real hardware RAID card in a system you purchase
> and you end up with a cheap silicon image... It happened to us once and it's
> not funny at all.
On the brightside, md raid5 is often faster than hardware raid5.  At 
least on the 7000 and 8000 series of 3ware hardware; the 9000 series 
looks promising though.  I haven't seen megaraid SATA numbers, and I 
don't know what happened to the SX8.

When the libata Marvell drivers come out, you'll have a cheap upgrade 
path for PCI-X boards if you want fast md raid: 
http://www.supermicro.com/products/accessories/addon/DAC-SATA-MV8.cfm  
$100 to add 8 unbottlenecked SATA ports to your server motherboard.

-ryan
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