From owner-freebsd-usb@FreeBSD.ORG Mon Oct 26 12:00:18 2009 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2FBD410656D3; Mon, 26 Oct 2009 12:00:17 +0000 (UTC) (envelope-from hselasky@c2i.net) Received: from swip.net (mailfe01.swip.net [212.247.154.1]) by mx1.freebsd.org (Postfix) with ESMTP id 016118FC1C; Mon, 26 Oct 2009 12:00:16 +0000 (UTC) X-Cloudmark-Score: 0.000000 [] X-Cloudmark-Analysis: v=1.0 c=1 a=MnI1ikcADjEx7bvsp0jZvQ==:17 a=8kQB0OdkAAAA:8 a=q02k-IL2iHknV7lpj6wA:9 a=CTJmsshOts1pr3bfzFYA:7 a=SZhWY9R5uFYAFvjjvwsRqqgiwfIA:4 a=9aOQ2cSd83gA:10 Received: from [188.126.201.140] (account mc467741@c2i.net HELO laptop.adsl.tele2.no) by mailfe01.swip.net (CommuniGate Pro SMTP 5.2.16) with ESMTPA id 266468916; Mon, 26 Oct 2009 13:00:15 +0100 From: Hans Petter Selasky To: freebsd-hackers@freebsd.org Date: Mon, 26 Oct 2009 12:59:23 +0100 User-Agent: KMail/1.11.4 (FreeBSD/9.0-CURRENT; KDE/4.2.4; i386; ; ) References: <20091025.133437.-1844000782.imp@bsdimp.com> <200910260959.20772.hselasky@c2i.net> <20091026.054816.1631944692.imp@bsdimp.com> In-Reply-To: <20091026.054816.1631944692.imp@bsdimp.com> X-Face: (%:6u[ldzJ`0qjD7sCkfdMmD*RxpOwEEQ+KWt[{J#x6ow~JO:,zwp.(t; @Aq :4:&nFCgDb8[3oIeTb^'",;u{5{}C9>"PuY\)!=#\u9SSM-nz8+SR~B\!qBv MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200910261259.23500.hselasky@c2i.net> Cc: hackers@freebsd.org, freebsd-usb@freebsd.org Subject: Re: Help troubleshooting... X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Oct 2009 12:00:18 -0000 On Monday 26 October 2009 12:48:16 M. Warner Losh wrote: > In message: <200910260959.20772.hselasky@c2i.net> > > Hans Petter Selasky writes: > : On Monday 26 October 2009 01:05:03 non@ever.sanda.gr.jp wrote: > : > M. Warner Losh wrote: > : > > I have a usb stick (8GB) on it. This stick has about 5GB of junk on > : > > it at this point. > : > > > : > > I tried to do 'cat * > /dev/null' recently, to measure how fast it > : > > goes. It got about 1GB into the drive and then I got device missing > : > > messages. > : > > > : > > So devfs thinks the device went missing: > : > > : > Warner-san, maybe it is caused by the hardware problem on the USB flash > : > memory. Some chip on the memory might have too much heat when you > : > access the memory at fast rate. Then it stops working. > : > : What happens if you read from two USB disks at the same time? > > I know that the august 25th version failed badly when I tried to burn > DVDs from a USB drive to a USB attached DVD burner. This used to work > flawlessly. > > : If the device went missing the USB HUB signalled that. This is maybe an > : indication that the USB firmware on the device crashed. Maybe this is due > : to heat, or unhandled race conditions when the load goes high. > > This same flash drive will do 20MB sustained on windows without a > glitch using similar commands. > > : Try using "dd" and vary the block size from 512 to 65536 bytes. Does it > : stop working with all block sizes over time? > > Once I get the message I posted, it is lights out for da0. No further > access to the drive works at all. > Make sure your driver has got sufficiently enough power, if powered over USB. --HPS