From: Steve Gaarder Subject: Can create and delete but not overwrite Date: Tue, 17 Aug 2010 08:11:17 -0400 (EDT) Message-ID: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed To: linux-nfs@vger.kernel.org Return-path: Received: from math.cornell.edu ([128.84.234.110]:36520 "EHLO math.cornell.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754319Ab0HQNVy (ORCPT ); Tue, 17 Aug 2010 09:21:54 -0400 Received: from reuleaux2.math.cornell.edu ([128.84.234.141]) by math.cornell.edu with esmtp (Exim 4.43) id 1OlL0f-000579-2t for linux-nfs@vger.kernel.org; Tue, 17 Aug 2010 08:11:17 -0400 Sender: linux-nfs-owner@vger.kernel.org List-ID: I have a strange problem with Kerberos security and NFVv4. I have two servers, one running RHEL 4 (kernel 2.6.9-89.0.25.ELsmp) and the other RHEL 5 (2.6.18-194.3.1.el5). Clients running either OS work fine. I have one user who is using Ubuntu (9.04 Jaunty; the kernel is 2.6.28-19-generic #61-Ubuntu). On that machine, he can access filesystems on the RHEL 5 server fine. Using filesystems mounted from the RHEL 4 server, authenticated users can create and write files, but they cannot write to an existing file. SO, for example, echo foo >foo works, but a subsequent echo foo >foo says "Input/Output Error". Any ideas? -- Steve Gaarder System Administrator, Dept of Mathematics Cornell University, Ithaca, NY, USA gaarder-O+4OpAMI7mIibAbXQ5Tkjg@public.gmane.org