From: Ted Ts'o Subject: Re: tune2fs can't be used on a mounted ext4, or...? Date: Mon, 11 Apr 2011 09:10:08 -0400 Message-ID: <20110411131008.GB5802@thunk.org> References: <20110410003954.4108b9c9@natsu> <14B9D41F-4D38-4F01-97E9-17E86DA578FC@dilger.ca> <20110410035005.64f565e3@natsu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andreas Dilger , linux-ext4@vger.kernel.org, linux-raid@vger.kernel.org To: Roman Mamedov Return-path: Content-Disposition: inline In-Reply-To: <20110410035005.64f565e3@natsu> Sender: linux-raid-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Hi Roman, Your symptoms don't sound familiar to me, other than the standard concerns about hardware induced file system inconsistency problems. Have you checked your logs carefully to make sure there weren't any hardware errors reported? If this is a hardware RAID system, is it regularly doing disk scrubbing? Has the hardware RAID reported anything unusual? How long have you been running in a degraded RAID 6 state? And have you tried shutting down the system and running fsck to make sure there weren't any file system corruption problems? When's the last time you've run fsck on the system? If this is an LVM system, I'd strongly suggest that you set aside space you can take a snapshot, and then regularly take a snapshot, and then run fsck on the snapshot. If any problems are noted, you can then schedule downtime and fsck the entire system. Regards, - Ted