From owner-freebsd-questions@FreeBSD.ORG Thu Jun 14 15:18:55 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id CF1A5106566B for ; Thu, 14 Jun 2012 15:18:55 +0000 (UTC) (envelope-from jmc-freebsd2@milibyte.co.uk) Received: from avasout05.plus.net (avasout05.plus.net [84.93.230.250]) by mx1.freebsd.org (Postfix) with ESMTP id 5D7808FC19 for ; Thu, 14 Jun 2012 15:18:55 +0000 (UTC) Received: from milibyte.co.uk ([84.92.153.232]) by avasout05 with smtp id NFJm1j001516WCc01FJn4q; Thu, 14 Jun 2012 16:18:47 +0100 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.0 cv=AYoz7grG c=1 sm=1 a=lfSX4pPLp9EkufIcToJk/A==:17 a=rLpCYgkgFLgA:10 a=afQzSb51MlMA:10 a=ZTb9aqGL9YkA:10 a=8nJEP1OIZ-IA:10 a=D7rCoLxHAAAA:8 a=a-LAJSeMAK4wfdxV45sA:9 a=wPNLvfGTeEIA:10 a=lfSX4pPLp9EkufIcToJk/A==:117 From: Mike Clarke To: freebsd-questions@freebsd.org Date: Thu, 14 Jun 2012 16:18:44 +0100 User-Agent: KMail/1.9.10 References: <4FD967E8.60305@dreamchaser.org> <20120614164546.6e83bb12.freebsd@edvax.de> In-Reply-To: <20120614164546.6e83bb12.freebsd@edvax.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201206141618.44981.jmc-freebsd2@milibyte.co.uk> Subject: Re: USB device activity when not mounted X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Jun 2012 15:18:55 -0000 On Thursday 14 June 2012 15:45:46 Polytropon wrote: > However, as you said > it might be possible that _inside_ the USB stick there is > still an action that needs to be performed and therefore > requires power. That's a possibility. > But I doubt this takes several seconds to > complete... I've just run a test here. The umount command returns almost instantaneously and the light, which is normally only lit while data is flowing, flickers for about 2 seconds after the umount command. But further testing showed that it flickers for 2 seconds after reading single byte file so perhaps the blinkenlight is configured with a minimum activation time. Being cautious however, I always wait a few seconds before removing any USB stick from any computer. -- Mike Clarke