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Wed Jan 14 04:53:09 PST 2009

From: "Simon 'corecode' Schubert" <corecode at>
Subject: Re: RAID 1 or Hammer
Date: Wed, 14 Jan 2009 13:49:29 +0100
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Jasse Jansson wrote:
> First of all, thanks Simon for the links, It sure was interesting reading.
> On Jan 14, 2009, at 11:45 AM, Bjørn Vermo wrote:
>> I have toyed with the idea that one drive in a mirrored pair ought to
>> have the addresses inverted, so sector 1 on one drive is mapped to
>> sector MAX -1 on the other.
> I read it like the locality (radius) of the errors occur on the same disc,
> so I don't see the benefit from your "reversed mirror strategy".
> You will also get some interesting performance problems to tackle, when
> one disc works on the inner tracks and the other one is on the outer
> tracks.

Or you get benefits for reads :)


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