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Date:      Thu, 17 Jan 2008 16:45:41 +0100
From:      Sten Daniel Soersdal <netslists@gmail.com>
To:        Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
Cc:        Michael Lednev <liettneff@bk.ru>, Christian Baer <christian.baer@uni-dortmund.de>, freebsd-questions@freebsd.org
Subject:   Re: RAID mirror really worked
Message-ID:  <478F7825.4030107@gmail.com>
In-Reply-To: <20080114170016.N2442@wojtek.tensor.gdynia.pl>
References:  <20080113175319.K1468@border.lukas.is-a-geek.org>	<20080114074736.L1166@wojtek.tensor.gdynia.pl>	<fmfg24$102j$2@nermal.rz1.convenimus.net>	<33530618.20080114175618@bk.ru> <20080114170016.N2442@wojtek.tensor.gdynia.pl>

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Wojciech Puchar wrote:
>>>> gmirror works too very good without any hardware :)
>>
>> CB> Yes, but a hardware RAID works without the OS having to know about 
>> it. :-)
>>
>> ...and its failures? ;)
>>
> :)
> 
> for mirroring there is almost no CPU overhead so buying extra hardware 
> doesn't make sense at all. not mentioning that most of such hardware are 
> actually normal disk controllers with extra soft in BIOS. these are 
> supported by ataraid driver.
> 
> 
> much better is to use gmirror so it will be completely portable.
> 
> and - with gmirror you DO NOT have to mirror/stripe/concat whole drives.
> and that's what i do most often - mirror important data but store 
> unimportant data without it.

... But with a raid controller mirror you do not have to send the data 
twice over the host bus.

gmirror is awesome

-- 
Sten Daniel Soersdal



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