From: Theodore Ts'o Subject: Re: Issue with bad file system Date: Mon, 19 Nov 2012 15:24:53 -0500 Message-ID: <20121119202453.GC30091@thunk.org> References: <20121119083245.18044.qmail@science.horizon.com> <50AA6913.2090104@redhat.com> <20121119184107.GA29487@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Eric Sandeen , George Spelvin , linux-ext4@vger.kernel.org To: Drew Reusser Return-path: Received: from li9-11.members.linode.com ([67.18.176.11]:33632 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754827Ab2KSUY6 (ORCPT ); Mon, 19 Nov 2012 15:24:58 -0500 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Nov 19, 2012 at 07:53:13PM +0000, Drew Reusser wrote: > > mint mnt # debugfs -s 32768 -b 4096 /dev/md0 > debugfs 1.42.5 (29-Jul-2012) > /dev/md0: Bad magic number in super-block while opening filesystem > debugfs: > debugfs: ls > ls: Filesystem not open > debugfs: Sorry, I didn't realize that you weren't able to find *any* backup super blocks. In that case, either you got really unlucky and you had some failure which has taken out a very large number of blocks, spread out across the file system --- or I'd have to agree with Eric, I'd want to be really, really sure that the Raid array hadn't gotten assembled incorrectly somehow.... - Ted