From owner-freebsd-questions@freebsd.org  Tue Apr 19 20:42:48 2016
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From: Michael Powell <nightrecon@hotmail.com>
Subject: Re: Raid 1+0
Date: Tue, 19 Apr 2016 16:43:37 -0400
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Valeri Galtsev wrote:

> 
> 
> On Tue, April 19, 2016 9:38 am, Steve O'Hara-Smith wrote:
>> On Mon, 18 Apr 2016 17:05:22 -0500 (CDT)
>> "Valeri Galtsev" <galtsev@kicp.uchicago.edu> wrote:
>>
>>> Not correct. First of all, in most of the cases, failure of each of the
>>> drives are independent events
>>
>> If only that were so. When the drives are as near identical as
>> manufacturing can make them and have had very similar histories they can
>> be
>> expected to have very similar wear and be similarly close to failure at
>> all
>> times, which makes it likely that the load imposed by one failing will
>> push
>> another over.
> 
> Sigh. You need suggest some physics that will make one drive affect
> another (aged or not aged doesn't matter for me). Then you will have me in
> your team.

Vibration is kinetic energy.  :-)

-Mike