From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754219AbdEHSo7 convert rfc822-to-8bit (ORCPT ); Mon, 8 May 2017 14:44:59 -0400 Received: from dekaresearch.com ([64.223.223.3]:40059 "EHLO DEKAEXCHANGE13.deka.local" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751191AbdEHSo5 (ORCPT ); Mon, 8 May 2017 14:44:57 -0400 X-Greylist: delayed 901 seconds by postgrey-1.27 at vger.kernel.org; Mon, 08 May 2017 14:44:57 EDT From: Atlant Schmidt To: Pavel Machek , Boris Brezillon CC: Ricard Wanderlof , "linux-scsi@vger.kernel.org" , "linux-ide@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Hans de Goede , "linux-mtd@lists.infradead.org" , "Henrique de Moraes Holschuh" , Tejun Heo , David Woodhouse Subject: RE: Race to power off harming SATA SSDs Thread-Topic: Race to power off harming SATA SSDs Thread-Index: AQHSx3JFctPERYlv+k+SpA1gxjwTkqHqS5sAgAAEtACAAAnUgIAABoQAgAAE7oCAAANdgIAAAOCAgAARuwCAABsUgIAAUfEA///Z2bA= Date: Mon, 8 May 2017 18:29:53 +0000 Message-ID: References: <20170507204007.GA25628@atrey.karlin.mff.cuni.cz> <1494228094.6528.14.camel@infradead.org> <1494231215.6528.22.camel@infradead.org> <1494233673.6528.28.camel@infradead.org> <7ee84982-cfad-94d7-4e22-4edbeb852b32@redhat.com> <1494238390.6528.42.camel@infradead.org> <20170508135005.0b9b200b@bbrezillon> <20170508164322.GA9781@amd> In-Reply-To: <20170508164322.GA9781@amd> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [172.16.116.65] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Well, you are right.. and I'm responsible. > > What I was trying to point out was that storage people try to treat SSDs as HDDs... > and SSDs are very different. Harddrives mostly survive powerfails (with emergency > parking), while it is very, very difficult to make SSD survive random powerfail, > and we have to make sure we always powerdown SSDs "cleanly". It all depends on the class of SSD that we're discussing. "Enterprise class" SSDs will often use either ultracapacitors or batteries to allow them to successfully complete all of the necessary operations upon a power cut. This e-mail and the information, including any attachments it contains, are intended to be a confidential communication only to the person or entity to whom it is addressed and may contain information that is privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender and destroy the original message. Thank you. Please consider the environment before printing this email.