From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from csamuel.org ([74.50.50.137]:54160 "EHLO csamuel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755133AbaCNH1e (ORCPT ); Fri, 14 Mar 2014 03:27:34 -0400 Received: from localhost (localhost [127.0.0.1]) by csamuel.org (Postfix) with ESMTP id A5CE141774 for ; Fri, 14 Mar 2014 18:27:33 +1100 (EST) Received: from csamuel.org ([127.0.0.1]) by localhost (csamuel.org [127.0.0.1]) (amavisd-maia, port 10024) with LMTP id 15134-01 for ; Fri, 14 Mar 2014 18:27:33 +1100 (EST) Received: from quad.localnet (ppp59-167-127-196.static.internode.on.net [59.167.127.196]) by csamuel.org (Postfix) with ESMTPSA id 4615141772 for ; Fri, 14 Mar 2014 18:27:33 +1100 (EST) From: Chris Samuel To: linux-btrfs@vger.kernel.org Subject: Re: discard synchronous on most SSDs? Date: Fri, 14 Mar 2014 18:27:26 +1100 Message-ID: <1523699.N4qpGEZQ9Y@quad> In-Reply-To: References: <531C1CC4.701@gmail.com> <20140314021159.GQ18959@merlins.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2386156.aHj2Ovt5sT"; micalg="pgp-sha1"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --nextPart2386156.aHj2Ovt5sT Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="us-ascii" On Thu, 13 Mar 2014 09:39:02 PM Chris Murphy wrote: > smartctl -a or -x will tell you what SATA revision is in place. The q= ueued > trim support is in SATA Rev 3.1. I'm not certain if this requires onl= y the > drive to support that revision level, or both controller and drive. Both I'd say as I believe it's the controller that has to issue it to t= he=20 drive, and the drive needs to understand it. cheers, Chris =2D-=20 Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC --nextPart2386156.aHj2Ovt5sT Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQEVAwUAUyKvXo1yjaOTJg85AQIYRgf9GuIYv9T6Pg+TwvKf8TH9HZNZTvX+K+v+ rDm6zlZHkYTw6tR/pHCkB4RLBCzcoBpESQYbozXz3P5jCbzfd+He9KoTZuUTAf73 IMXweY8jxZXU+Q1fO2EoDdtaey8yCzCS7mHe/UL9xzhIY/ct5YAbnTYgrIY0xw01 2m5IKGZJEK/M3XydU5zmKQK2szfTbEDf4vj4H4BWSdq3pA/Eqib6eaB4JDRgxySb 7YfugC0H3lAabi8oLaHngIk/Ne3HxiK7IJnUSb6knzVqKJ0nSJMo6v/0Pa5RM7wQ ZWpFaC1APpmzoAS9ZBZTOc1SX2FXyw17stucTTsQYjRk9AdLVzmPRQ== =5EEH -----END PGP SIGNATURE----- --nextPart2386156.aHj2Ovt5sT--