From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Youngman <anthony@youngman.org.uk>
Subject: Re: hung grow
Date: Wed, 4 Oct 2017 20:06:26 +0100
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To: Curt <lightspd@gmail.com>, Joe Landman <joe.landman@gmail.com>
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On 04/10/17 19:37, Curt wrote:
> Assuming I can do a dd on one of my failed drives, will I be able to
> recover the data that's on the 4 that were good, before I took bad
> advice?  Also, will I need to dd on the failed drives or can I do 2 of
> the 3?

First, use ddrescue, not dd.

Secondly, you only need one drive to give you "5 out of 7". The most 
recent drive the better!

Cheers,
Wol