linux-kernel - Re: Raid 10 question/problem [ot]

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Message-ID: <Pine.LNX.4.61.0701282238570.22295@yvahk01.tjqt.qr>
Date:	Sun, 28 Jan 2007 22:40:07 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Michael Tokarev <mjt@....msk.ru>
cc:	Bill Davidsen <davidsen@....com>, Marc Perkel <mperkel@...oo.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Raid 10 question/problem [ot]


On Jan 28 2007 22:49, Michael Tokarev wrote:
>Bill Davidsen wrote:
>[]
>> RAID-10 is not the same as RAID 0+1.
>
>It is.  Yes, there's separate module for raid10, but what it - basically -
>does is the same as raid0 module over two raid1 modules will do.  It's
>just a bit more efficient (less levels, more room for optimisations),
>easy to use (you'll have single array instead of at least 3), and a bit
>more flexible;  at the same way it's less widely tested...

And most importantly, raid10 allows you to spread the array data over an odd
number of devices while still having [at least] 2 copies of each block.

Hm, I really wished resizing was implemented for raid0 and raid10 too... ;)


	-`J'
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