From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH] speed up SATA Date: Mon, 29 Mar 2004 15:13:35 -0500 Sender: linux-ide-owner@vger.kernel.org Message-ID: <4068836F.2050503@pobox.com> References: <4066021A.20308@pobox.com> <20040329113641.GE1453@openzaurus.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:49037 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S263131AbUC2UNt (ORCPT ); Mon, 29 Mar 2004 15:13:49 -0500 In-Reply-To: List-Id: linux-ide@vger.kernel.org To: David Lang Cc: Pavel Machek , linux-ide@vger.kernel.org, Linux Kernel , Andrew Morton David Lang wrote: > Pavel, when you say that 32MB would be 1 second is that due to the limits > of the SATA bus or are you baseing this on a particular drive? > > if you are basing it on a current single SATA drive (7200rpm 8MB cache, > etc) consider that if you are writing to a solid state drive or to an > array that presents itself as a single SATA drive then the transaction can > happen MUCH faster. > > if this is a limit of the SATA interface bitrate, consider that over the > last several years EVERY interface has seen it's bitrate climb > significantly, frequently with little (if any) fundamentalchange to the > drivers nessasary to run things. Sata-1 is 1.5Gbps, and Sata-2 is 3.0Gbps. 6.0Gbps is the next step people seem to be working on... Jeff