From owner-freebsd-hackers@FreeBSD.ORG  Thu Jun 14 05:19:01 2012
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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Thu, 14 Jun 2012 07:13:23 +0200
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Cc: Ian Lepore <freebsd@damnhippie.dyndns.org>,
	Eitan Adler <lists@eitanadler.com>, Mel Flynn <rflynn@acsalaska.net>,
	claudiu vasadi <claudiu.vasadi@gmail.com>,
	Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
Subject: Re: FreeBSD Boot Times
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On Wednesday 13 June 2012 23:35:17 Mel Flynn wrote:
> On 13-6-2012 23:16, claudiu vasadi wrote:
> > If you simplky do "sysctl -d hw.usb.no_boot_wait" you will see the
> > explanation ;)
> 
> Probably why Eitan asked as that description:
> a) means nothing to people unfamiliar with device enumerations
> b) does not point to a manual page that explains how USB does device
> enumerations and why it would account for a significant chunk of the
> boot process.

It's not dangerous. It only means that you can't boot off a USB disk for 
example, because the USB stack will then not wait for the BOOT device at 
mount-root time, if you set this options. 

--HPS