From owner-freebsd-geom@FreeBSD.ORG Tue Dec 19 23:34:03 2006 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id BCA8D16A407 for ; Tue, 19 Dec 2006 23:34:03 +0000 (UTC) (envelope-from rabe@p-i-n.com) Received: from aposerv.p-i-n.com (aposerv.p-i-n.com [62.156.172.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3CEA843CBE for ; Tue, 19 Dec 2006 23:33:49 +0000 (GMT) (envelope-from rabe@p-i-n.com) Received: from p-i-n.com (pinserv2.p-i-n.com [10.101.240.52]) by aposerv.p-i-n.com (8.12.11/8.12.11) with ESMTP id kBJNXldw042633; Wed, 20 Dec 2006 00:33:47 +0100 (CET) (envelope-from rabe@p-i-n.com) Received: from pinserv2.p-i-n.com (localhost.p-i-n.com [127.0.0.1]) by p-i-n.com (8.13.6/8.13.6) with ESMTP id kBJNXiHN076667; Wed, 20 Dec 2006 00:33:44 +0100 (CET) (envelope-from rabe@pinserv2.p-i-n.com) Received: (from rabe@localhost) by pinserv2.p-i-n.com (8.13.6/8.13.6/Submit) id kBJNXiaB076666; Wed, 20 Dec 2006 00:33:44 +0100 (CET) (envelope-from rabe) Date: Wed, 20 Dec 2006 00:33:44 +0100 From: "Raphael H. Becker" To: Ivan Voras Message-ID: <20061219233344.GA75640@p-i-n.com> References: <20061214184940.GA50750@p-i-n.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.2i Organization: PHOENIX Pharmahandel AG & Co KG, Mannheim, Deutschland Cc: freebsd-geom@freebsd.org Subject: Re: gstripe oder graid3 on USB-Sticks X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Dec 2006 23:34:03 -0000 Hello Ivan, On Tue, Dec 19, 2006 at 09:54:50PM +0100, Ivan Voras wrote: > Raphael H. Becker wrote: > > Hello *, > > > > today I bought 3 USB sticks to find out, if there's something to play > > with GEOM on it. My FreeBSD ist 6.2-RC1. > > > umass0: BBB reset failed, IOERROR This happened on pulling one of the three sticks. > As someone who had the same idea recently I can tell you that the > problem you're seeing is almost certainly in the motherboard. My sticks > draw ~250 mA, but it turns out my 4 USB ports are wired such that they > all share the same 500 mA source, resulting in weird and random > appearing errors when all three are connected. > > Try finding separately powered USB ports (new motherboards often have > them on board but lack the connectors). I use them on a USB hub with an external power supply. I don't think this is a power-issue cause I tried this last year using two self powered USB2.0 HDD with geom-stripe. Same result: writing is pretty good, reading a file using dd locks up. (6.0-RELEASE) Maybe, I will try this next days, it is an issue about reading parallel from different devices on a USB hub, which (probably) cannot satisfy two concurrent tasks at the same time at the same root-hub/port. gstripe3 was able to rebuild the RAID after re-inserting an arbitrary stick of the 3, so USB+GEOM seems to be fine here. Maybe this I completly unrelated to GEOM, I cannot guess this. Regards Raphael