From mboxrd@z Thu Jan  1 00:00:00 1970
From: Brad Campbell <lists2009@fnarfbargle.com>
Subject: Re: Raid5 to raid6 reshape or recreate?
Date: Thu, 14 Aug 2014 11:29:18 +0800
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To: Ram Ramesh <rramesh2400@gmail.com>, linux-raid@vger.kernel.org
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On 14/08/14 01:25, Ram Ramesh wrote:

> On a slightly different topic, will it be faster after a disk
> fail/replacement as opposed to raid reshaping?

Much.
I just re-striped a RAID6 changing the chunk size from 128k to 64k. This 
took 12 days all up. It's the seeking that kills it. To replace a disk 
or do a resync on the same array takes less than 10 hours.