From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH] speed up SATA Date: Sat, 27 Mar 2004 18:11:57 -0500 Sender: linux-ide-owner@vger.kernel.org Message-ID: <40660A3D.3020300@pobox.com> References: <4066021A.20308@pobox.com> <40660877.3090302@stesmi.com> 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]:8115 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S261925AbUC0XMQ (ORCPT ); Sat, 27 Mar 2004 18:12:16 -0500 In-Reply-To: <40660877.3090302@stesmi.com> List-Id: linux-ide@vger.kernel.org To: Stefan Smietanowski Cc: linux-ide@vger.kernel.org, Linux Kernel , Andrew Morton Stefan Smietanowski wrote: > What will happen when a PATA disk lies behind a Marvel(ous) bridge, as > in most SATA disks today? Larger transfers work fine in PATA, too. WRT bridges, it is generally the best idea to limit to UDMA/100 (udma), but larger transfers are OK. > Is large transfers mandatory in the LBA48 spec and is LBA48 really > mandatory in SATA? Yes and no, in that order :) SATA doesn't mandate lba48, but it is highly unlikely that you will see SATA disk without lba48. Regardless, libata supports what the drive supports. Older disks still work just fine. Jeff