Date: Tue, 26 Jul 2011 17:03:39 +0200 From: Jerome Herman <jherman@dichotomia.fr> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-stable@freebsd.org Subject: Re: Making world but no kernel Message-ID: <4E2ED74B.9000807@dichotomia.fr> In-Reply-To: <23BD778B-B9A4-43ED-97C6-4DF2D13F80F2@mac.com> References: <4E2E9F24.1040108@dichotomia.fr> <20110726114438.GA86683@icarus.home.lan> <4E2EB814.9040704@dichotomia.fr> <20110726131655.GA88280@icarus.home.lan> <4E2ECE62.4050605@dichotomia.fr> <23BD778B-B9A4-43ED-97C6-4DF2D13F80F2@mac.com>
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On 26/07/2011 16:58, Chuck Swiger wrote: > On Jul 26, 2011, at 7:25 AM, Jerome Herman wrote: >> Actually it is Raid 10 of a sort. Three first halves of the three disk concatenated and mirrored on the three second half of the same drives. > There's a significant problem right there. Not only will that configuration badly degrade the performance of the RAID volume, it also compromises the goal of redundancy which RAID-1 is supposed to provide. > > Regards, Disk are interweaved, so the performances are quite good (about 160% of a single drive) and the redundancy is here. Any single drive can fail, and the other two will be there to provide data. Basically the first plesk is a-b-c, and the second is b-c-a, so everything should be fine.
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