From owner-freebsd-questions@FreeBSD.ORG Sat Oct 16 07:32:16 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D541916A4CE for ; Sat, 16 Oct 2004 07:32:16 +0000 (GMT) Received: from relay.pixi.com (relay.pixi.com [206.127.224.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9648643D1F for ; Sat, 16 Oct 2004 07:32:16 +0000 (GMT) (envelope-from knowtree@aloha.com) Received: from carter.pixi.com ([206.127.224.102]:1371 "EHLO carter.pixi.com") by relay.pixi.com with ESMTP id S9240AbUJPHcP (ORCPT ); Fri, 15 Oct 2004 21:32:15 -1000 Received: from Internal (206.127.224.85) by carter with SMTP; Sat, 16 Oct 2004 07:32:17 GMT X-Titankey-e_id: <5308c577-6566-4c9e-b287-76895e7fe9d0> Received: from vaiosr7k.ozland (atm-251-63.pixi.com [206.127.251.63]) by koa.aloha.com (8.12.10/8.12.2) with ESMTP id i9G7URBH024733; Fri, 15 Oct 2004 21:30:29 -1000 (HST) From: Gary Dunn To: Bigbrother In-Reply-To: <200410141758.i9EHwDMm000439@bigb3server.bbcluster.gr> References: <200410141758.i9EHwDMm000439@bigb3server.bbcluster.gr> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Evolution/0.13 (Preview Release) Date: 15 Oct 2004 21:31:22 -1000 Message-Id: <1097911884.2633.10.camel@vaiosr7k.ozland> Mime-Version: 1.0 cc: freebsd-questions@freebsd.org Subject: Re: NFS data integrity failure X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 16 Oct 2004 07:32:16 -0000 On Thu, 2004-10-14 at 07:58, Bigbrother wrote: > > MachineB mounts machineA:/disk and puts 1.2 GB of data from its disk to the > machineA dick. A CRC check performed on the copied files show that > everything is correct. (always!) Then do it this way :-) Seriously, though, to isolate NFS you need to exercise the network and file systems using other methods. How about transfering the same files using a) ftp and b) scp. If the problem is dropped packets or fragmentation or stuck bits in the NIC, those methods will be equally unsuccessful. Does either machine ever display an error message about nfs going down then coming back? I can't remember the exact words, something like connection lost then restored. When this happens to me at work it is due to the ethernet switch port one system is connected to coming up in half duplex instead of full duplex. Once it was a bad cat5 cable. Are the file sizes different? -- Gary Dunn knowtree@aloha.com Honolulu