From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladimir Bashkirtsev Subject: librbd: error finding header Date: Mon, 09 Jul 2012 15:12:13 +0930 Message-ID: <4FFA6F35.4040102@bashkirtsev.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.logics.net.au ([150.101.56.178]:34244 "EHLO mail.logics.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750785Ab2GIFmu (ORCPT ); Mon, 9 Jul 2012 01:42:50 -0400 Received: from x.logics.net.au (gw.logics.net.au [150.101.235.251] (may be forged)) (authenticated bits=0) by mail.logics.net.au (8.14.5/8.14.1) with ESMTP id q695gDYw001336 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Mon, 9 Jul 2012 15:12:15 +0930 Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel@vger.kernel.org Hello, I just hit this error: error opening image sip.logics.net.au: (2) No such file or directory 2012-07-09 15:03:59.935835 7ffbe0673780 -1 librbd: error finding header: (2) No such file or directory Googled around and found that Oliver Francke had similar issue back in March. Read your responses but still unclear where to start to dig. Just upgraded from 0.47.3 to 0.48, done rolling upgrade and all RBD images are OK with exception of this one. Notably as upgrade was done while VM was up it continued to run unaffected (ie all data inside of VM was written and read as nothing happened). It makes me think that there no data loss but mere broken header. Of course I have a backup of VM and can pull it back in no time but I am really interested (and I am sure other ceph users) how to recover from such failures? Regards, Vladimir