From: "Renato S. Yamane" Subject: Re: Ext4 on SSD Intel X25-M Date: Thu, 12 Nov 2009 18:06:54 -0200 Message-ID: <4AFC6ADE.30802@diamondcut.com.br> References: <4AFC14D6.7080700@diamondcut.com.br> <20091112153017.GA32122@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Theodore Tso , sandeen@redhat.com To: linux-ext4@vger.kernel.org Return-path: Received: from smtp-01.mandic.com.br ([200.225.81.132]:41742 "EHLO smtp-01.mandic.com.br" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754200AbZKLUGu (ORCPT ); Thu, 12 Nov 2009 15:06:50 -0500 Received: from unknown (HELO [192.168.1.104]) (48XWxNa3qdTI2cq3yJaVop5Ok6I=@[200.228.134.10]) (envelope-sender ) by smtp-01.mandic.com.br (qmail-ldap-1.03) with AES256-SHA encrypted SMTP for ; 12 Nov 2009 20:06:52 -0000 In-Reply-To: <20091112153017.GA32122@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: On 12-11-2009 13:30, Theodore Tso wrote: > On Thu, Nov 12, 2009 at 11:59:50AM -0200, Renato S. Yamane wrote: >> [please, leave me on cc because I'm not subscribed on this ML] >> >> I'm using Intel SSD X25-M on my laptop, and I always hear that is not a >> good idea use journal on SSD (it decrease the life time). >> >> I ask Intel about this, but I don't receive any answer. >> >> So, I would like to know if is possible disable Journal on EXT4. > > It is possible to create an ext4 file system without a journal. It > would mean that unclean shutdowns would require a full fsck, which on > a freshly created file system on an SSD isn't _that_ bad. Depending > on how full/fragmented your filesystem happens to be, it will probably > be under 10 seconds. > > That being said, though, it shouldn't be necessary to avoid using a > journal on the Intel SSD. Intel says that laptop will last at least 5 > years with 10GB worth of writes per day... Woww! Thank you so much Theodore and Eric! I will keep using journal on my SSD X25-M. Regards, Renato S. Yamane