From owner-freebsd-questions@FreeBSD.ORG Tue Nov 17 19:41:19 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 608CB106568B for ; Tue, 17 Nov 2009 19:41:19 +0000 (UTC) (envelope-from djackson452@gmail.com) Received: from mail-yx0-f171.google.com (mail-yx0-f171.google.com [209.85.210.171]) by mx1.freebsd.org (Postfix) with ESMTP id 149018FC1C for ; Tue, 17 Nov 2009 19:41:18 +0000 (UTC) Received: by yxe1 with SMTP id 1so371635yxe.3 for ; Tue, 17 Nov 2009 11:41:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from :user-agent:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=JiLhq95GrquLv6Mk9317+I48THAVWbwhtVSH5T2prE4=; b=A6IaSA+0p6bC9cUWpvzw74pZjn4ji2AaV+eAz84fy0Q8DQxkLkYS4gFWgIJX4ha549 zV20ILVIZNQ/wq5DqwhTtv6APWnDjUo1+jKTqNhf0t11JllfSNfCUzaH9eDgi/V2Kmk1 Vnn53EtYsVRZOVzAVUKu748A+rIR0nE59NZRs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; b=D7+lq8RMaTxSuQ7NSYc3AbQ+TTMxArZDaFGyFoBWJsEte1YhSA/2QBRmP8drLd/8AC 674jBLFDrZ6YUBHearolzuDH/eM6jMj1+uZMjDBLsZV2DvogyIQmgcqWhMSlQMVMgyN5 HeclXeXv4DHVeqSpoT16kVErRe0yZMGLyqbXg= Received: by 10.150.113.13 with SMTP id l13mr688677ybc.248.1258486877213; Tue, 17 Nov 2009 11:41:17 -0800 (PST) Received: from ?192.168.1.103? (pool-96-254-203-152.tampfl.fios.verizon.net [96.254.203.152]) by mx.google.com with ESMTPS id 16sm2826202gxk.11.2009.11.17.11.41.15 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 17 Nov 2009 11:41:16 -0800 (PST) Message-ID: <4B02FB23.3060109@gmail.com> Date: Tue, 17 Nov 2009 14:36:03 -0500 From: David Jackson User-Agent: Thunderbird 2.0.0.22 (Windows/20090605) MIME-Version: 1.0 To: Maciej Milewski , freebsd-questions@freebsd.org References: <4B02B0AE.3040801@gmail.com> <200911171712.18850.milu@dat.pl> In-Reply-To: <200911171712.18850.milu@dat.pl> Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 8bit Cc: Subject: Re: Lockup problems with USB disks 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: Tue, 17 Nov 2009 19:41:19 -0000 Thank you. I took a look. I was just wondering if this was a known bug, is it normal, etc. Maciej Milewski wrote: > Dnia wtorek 17 listopad 2009 o 15:18:22 David Jackson napisał(a): > >> I have a USB hard drive. Whenever I open two programs which utilise the >> USB hard drive simultaneously, these programs, i assume when they >> attempt to write to the hard drive lock up due to what i suspect must be >> some issue with the USB driver and perhaps a deadlock involving multiple >> concurrent accesses to the drive. When they attempt to access the drive >> the programs can lock up for several minutes before being unblocked. >> When only one program is using the drive this behaviour does not seem to >> occur. >> >> It seems most likely that this is a USB level problem involving the USB >> drivers. I am using FreeBSD 7.1. It is annoying behaviour to say the >> least and I wonder what can be done about it, and if this issue is being >> addressed, perhaps in the recent redesign of the USB code. It seems to >> be a pretty consistent issue, happening with multiple installs of >> FreeBSD and different drives. >> >> Thank you. >> > I forgot to attach a link with information about this new stack. Some you can > find at http://ivoras.sharanet.org/freebsd/freebsd8.html > >