pci-e hardware raid controller

[Net Llama!]

On Tue, 5 Jun 2007, Vu Pham wrote:
> On Tue, 2007-06-05 at 10:06 -0500, C M Reinehr wrote:
>> On Tuesday 05 June 2007 08:50, Vu Pham wrote:
>>> I am looking for a sata pci-e *hardware* raid controller for Linux
>>> ( Suse 10.2 ). I mean the one that the Linux OS can see the whole raid
>>> system as one physical drive.
>>>
>>> This one will be use as a raid-0 with 4 SATA drives.
>>>
>>> Any recommendation ?
>>>
>>> Thanks,
>>>
>>> Vu
>>
>> Generally, when someone asks for help with a problem or information on a
>> product, I dislike receiving replies suggesting a different product. But, now
>> I'm going to do it. Why would you want to spend money to buy and additional
>> single point of failure, when you could accomplish the same thing for free
>> with LVM2 (logical volume management)?
>>
>> (Sorry, but I just couldn't help myself.)
>>
>
> No problem, all advice ( and critics ) are welcome :)
>
> There are two reasons:
>
> 1. this is a test system for coding and I would like to have the highest
> disk access performance as much as possible, and I think the hardware
> raid is faster than software raid. Or is the gain so small to afford a
> hardware raid ?

SW RAID is generally as fast as the controller its sitting on.  You 
shouldn't assume that HW RAID is faster than SW RAID.  Also, most people 
looking to use RAID solutions aren't doing it for better performance.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman                        netllama at linux-sxs.org
LlamaLand				http://netllama.linux-sxs.org