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Date: Wed, 3 Dec 2014 12:12:42 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: Andre Goree <andre@drenet.net>
Subject: Re: Issue with swap file
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On Wed, 3 Dec 2014, Andre Goree wrote:

> Several months ago, I followed the procedure here[1] for creating a swap 
> file.  This worked great for a long time, up until my last reboot which 
> coincided with an update to 10.1.
>
> agoree@fbsd10-atl ~ % grep swap /etc/fstab
> md99            none            swap    sw,file=/usr/swap 0     0
> agoree@fbsd10-atl ~ % sudo swapon -a
> swapon: mdconfig (attach) error: md99 on file=/usr/swap

Is /usr on that system a separate filesystem or part of the root / 
filesystem?