From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Scobie Subject: sata_sil24 performance weirdness Date: Thu, 28 Dec 2006 07:25:53 +1300 Message-ID: <4592BAB1.1050900@sauce.co.nz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.sauce.co.nz ([210.48.49.72]:57706 "EHLO smtp.sauce.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754670AbWL0SQE (ORCPT ); Wed, 27 Dec 2006 13:16:04 -0500 Received: from [192.168.4.111] (unknown [192.168.4.111]) by test.sauce.co.nz (Postfix) with ESMTP id 7DF30B387B for ; Thu, 28 Dec 2006 07:09:18 +1300 (NZDT) Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Robin H. Johnson wrote: >While dmesg claims that 3.0Gbps was negotiated, the combined >performance of the 5 disks never exceeds 1.5Gbps, no matter how I >combine them. Is something in the driver overriding the 3Gbps speed >bits somewhere? Perhaps there is a hardware/firmware issue with the Sil3132, as this has been reported at a reputable Mac hardware performance site, see: http://www.barefeats.com/quick.html The December 23rd entry, "ExpressCard SATA bandwidth woes" mentions exactly this issue with an Express card using the Sil3132 and on a Sil3132 based SATA Adaptor card. Regards, Richard