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From: Michael Powell <nightrecon@hotmail.com>
Subject: Re: USB stick and some help with it.
Date: Mon, 03 Aug 2015 12:41:39 -0400
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References: <55BF6AA0.2030802@bananmonarki.se> <55BF8824.9050803@gmail.com>
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Bernt Hansson wrote:

> 
> 
> On 2015-08-03 17:26, jd1008 wrote:
>> dd if=/dev/zero of=/dev/rda1
> dd if=/dev/zero of=/dev/rda1 bs=1m count=10
> 
> dd: /dev/rda1: Operation not supported

Does setting sysctl kern.geom.debugflags=16 (as root) make any difference? 
Don't recall for sure if it's supposed to be 16 or 15, but I've used this 
command before successfully to unlock.

-Mike