Re: [ale] Gigabyte MoBo RAID and RH-7.2

[Michael Smith]

My average IO speed is a good bit higher using RAID0 than no RAID at all.  
I forgot what the command was to check the speed(someone posted this a 
month or so ago) but when I compared it to others postings, my io speed was 
a good bit faster.  I guess its comparing apples to oranges unless you have 
the same Mobo and hard drives, though.

Mike


> On Wed, Mar 13, 2002 at 11:44:58PM -0500, Jeff Hubbs wrote:
>> Maybe that's why no one has busted buns to write the driver; why do it
>>  when kernel RAID is sitting there?
> 
> ...especially when the kernel raid has been extensively tested ans is
> known to be extemely reliable.  :)
>  
> You can't hot-swap drives with the onboard controllers, you can't add
> and remove drives to the array (on the fly) with the onboard
> controllers.. etc.
> 
>> Yeah, that's true, but there may be times when you want "ludicrous 
>> speed" from your drives and you're willing to get it at the expense of
>>  reliability.  Thankfully, many RAID controllers (dunno if kernel RAID
>>  does this yet) will let you make stripe sets out of mirrors or vice 
>> versa such that you can get that speed and still be able to lose one
>> or  more drives.
> 
> Oh, the kernel has let you do that for quite some time now.   RAID5 a
> set of RAID5 arrays?  No problem.  :)
> 
> But in all seriousness, single drive transfer rates are exceeding 40
> MB/sec, so you're rarely hurting for sustanied transfer speeds.  RAID0
> doesn't boost average access times either -- because you're striping,
> both drives generally need to be doing the same thing at the same time
> so you can't have 'em seeking individually -- and that's what really
> boosts performance.  Average I/Os per second.  
> 
>  - Pizza
> -- 
> Solomon Peachy                                   
> pizzaATfucktheusers.org I ain't broke, but I'm badly bent.             
>              ICQ# 1318344 Patience comes to those who wait.
>     ...It's not "Beanbag Love", it's a "Transanimate Relationship"...


-- 
Michael Smith
msmith at mikeandmel.com


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