From owner-freebsd-questions@FreeBSD.ORG Fri Feb 19 07:10:05 2010 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 ED806106566C for ; Fri, 19 Feb 2010 07:10:04 +0000 (UTC) (envelope-from normalbloke@gmail.com) Received: from mail-vw0-f54.google.com (mail-vw0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id A0D918FC1E for ; Fri, 19 Feb 2010 07:10:04 +0000 (UTC) Received: by vws14 with SMTP id 14so1094125vws.13 for ; Thu, 18 Feb 2010 23:10:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=f4LjEsQHElWQhkX+NtjivBslTOkYMZOE2/V3yDQEMQs=; b=OgsuUZi22M7Wpt2rBKOgRJbR1BMT1GtmGqpv6eufw34xvlpuqs9qERwCWuYUmFuDF+ G9yttFnagsOrwU+COJj2zPwmTewFcAr49FFp3nP1dL+KKjeAKNOXzmMCiAa8+GECdag5 ul0Q7kfYSr7w1F+E1zEWLqQYoIuHDynexOfMY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=COg6zpPfby+8pH9EcwwX2ZQ4eh9d9w6YpAznAbvJsOHHVXu1U1kjO6ZL1eb0muORYI F2O0lykxhjbDLtXBjTJq7+3OCAR3iXdFzKXRU0aSA+FAe5W8enVdtSwCOJktxdJ1e4p1 WJ4ptaMB74z5huZsRWBUEQ6Y+aDZap+JgcaKc= MIME-Version: 1.0 Received: by 10.220.88.70 with SMTP id z6mr3867930vcl.65.1266563403779; Thu, 18 Feb 2010 23:10:03 -0800 (PST) In-Reply-To: <9512FFD9-F4E3-4038-9111-56C6D232AF12@ketralnis.com> References: <9512FFD9-F4E3-4038-9111-56C6D232AF12@ketralnis.com> Date: Fri, 19 Feb 2010 17:10:03 +1000 Message-ID: From: Patrick Collins To: David King Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-questions@freebsd.org Subject: Re: Maximum Number of USB Mass Storage Devices 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: Fri, 19 Feb 2010 07:10:05 -0000 Thanks David. My question was specific to FreeBSD's limitations rather than USB limitiations. On 19/02/2010, David King wrote: > > > I have a requirement to connect a large number of USB bus powered > external > > hard disks to a FreeBSD 8.0 system. I am talking about hundreds of them. > > The USB spec itself limits to 127 devices per bus, including hubs (and > including the internal hub-like device on many busses). < > http://en.wikipedia.org/wiki/Universal_Serial_Bus#Overview> > > > I am aware of the power and bus limitations and intend to use power hubs > and > > multiple server USB ports to overcome this issue. My question is this: > > > > Does FreeBSD 8.0-RELEASE have an operating system limitation on the > number > > of USB storage devices I can connect and mount. > > > > Thanks. > > > > Patrick Collins > -- Patrick Collins +61 419 712 581