From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751467AbaI3XSQ (ORCPT ); Tue, 30 Sep 2014 19:18:16 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:41062 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750780AbaI3XSO (ORCPT ); Tue, 30 Sep 2014 19:18:14 -0400 X-Sasl-enc: BuqWnyY5FrKA3MW+J5sbXLO7mDBNYkij8UJMK+ON/3kC 1412119093 Date: Tue, 30 Sep 2014 20:18:01 -0300 From: Henrique de Moraes Holschuh To: Pavel Machek Cc: "Theodore Ts'o" , kernel list , jack@suse.cz, linux-ext4@vger.kernel.org, adilger.kernel@dilger.ca, Dmitry Monakhov Subject: Re: ext4: 3.17? problems Message-ID: <20140930231801.GB729@khazad-dum.debian.net> References: <20140929114408.GC2738@quack.suse.cz> <87iok6ojis.fsf@openvz.org> <20140928124658.GB6694@thunk.org> <20140930210108.GB14283@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140930210108.GB14283@amd> X-GPG-Fingerprint1: 4096R/39CB4807 C467 A717 507B BAFE D3C1 6092 0BD9 E811 39CB 4807 X-GPG-Fingerprint2: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 30 Sep 2014, Pavel Machek wrote: > > > So I had to hard power-down the machine. That should be perfectly > > > safe, as ext4 has a journal, and this is plain SATA disk, right? > > Yes, it should be safe. > > Good. ... > Is there some phase during shutdown where journalling no longer > protects fs integrity? Hmm... what kind of backing device? Because I have Crucial/Micron M500 SSDs here that _always_ complain (in a SMART counter/attribute) that they have been subject to a sudden poweroff *when subject to a normal system shutdown*. This is scaring me a great deal. Are we doing something different for SSDs in the scsi-sd or libata shutdown paths? -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh