From: Maurice Volaski Subject: [NFS] the infamous" device is busy" bug Date: Fri, 13 Jun 2008 19:22:02 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" To: nfs@lists.sourceforge.net Return-path: Received: from neil.brown.name ([220.233.11.133]:54194 "EHLO neil.brown.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756155AbYFMXWa (ORCPT ); Fri, 13 Jun 2008 19:22:30 -0400 Received: from brown by neil.brown.name with local (Exim 4.63) (envelope-from ) id 1K7IbD-00065U-MM for linux-nfs@vger.kernel.org; Sat, 14 Jun 2008 09:22:27 +1000 In-Reply-To: Sender: linux-nfs-owner@vger.kernel.org List-ID: I'm running 2.6.25-gentoo-r1 on an AMD 64 box along with nfs-utils-1.1.2-r1 and I have /var/lib/nfs symlinked to a separate filesystem, /database/nfs Now the system is running drbd and heartbeat and /database is on drbd, so that if the server fails, the secondary server will be able to immediately take over nfs using the identical data on its /database/nfs. If, however, I want to manually stop heartbeat on the primary server, I cannot because /database will not umount, complaining "the device is busy". I've tried to manually by shutting down all things nfs, but something is still holding it, and nfsd in the kernel is the culprit. I tested that by loading the module and from that point forward, trying to unmount /database just results in the "device is busy" complaint. That means the only way I can shutdown heartbeat is to physically shut down the server. -- Maurice Volaski, mvolaski-Q33DkHiyi7z2fBVCVOL8/A@public.gmane.org Computing Support, Rose F. Kennedy Center Albert Einstein College of Medicine of Yeshiva University ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs _______________________________________________ Please note that nfs@lists.sourceforge.net is being discontinued. Please subscribe to linux-nfs@vger.kernel.org instead. http://vger.kernel.org/vger-lists.html#linux-nfs