From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:51743 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753833AbaCPQHQ (ORCPT ); Sun, 16 Mar 2014 12:07:16 -0400 To: Chris Samuel Cc: linux-btrfs@vger.kernel.org Subject: Re: discard synchronous on most SSDs? From: "Martin K. Petersen" References: <531C1CC4.701@gmail.com> <20140314051750.GY6143@merlins.org> <5289248.oqpgSKG6td@quad> <1908923.tvpl1fFKJ5@quad> Date: Sun, 16 Mar 2014 12:07:10 -0400 In-Reply-To: <1908923.tvpl1fFKJ5@quad> (Chris Samuel's message of "Sat, 15 Mar 2014 15:06:25 +1100") Message-ID: MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: >>>>> "Chris" == Chris Samuel writes: Chris> SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Chris> Of course that's what the drive is reporting it supports, I'm not Chris> sure whether that's the result of what has been negotiated Chris> between the controller and drive or purely what the drive Chris> supports. It just what the drive reports. Often drives will implement features before they are ratified in the spec and thus before they can claim compliance with a specific version. -- Martin K. Petersen Oracle Linux Engineering