From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: SATA II NCQ and multi-port add-on card (PCI or PCIe x1) Date: Thu, 30 Jul 2009 08:47:56 -0400 Message-ID: <4A71967C.1010808@rtr.ca> References: <0KNK00628MWA08Z1@vms173005.mailsrvcs.net> <4A712A22.6030708@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rtr.ca ([76.10.145.34]:50865 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751058AbZG3Mr6 (ORCPT ); Thu, 30 Jul 2009 08:47:58 -0400 In-Reply-To: <4A712A22.6030708@kernel.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: dhdurgee@verizon.net, linux-ide@vger.kernel.org Tejun Heo wrote: > > I know sil3132 generally works well although it's quirky at times and > has bandwidth limitation. Mark, how well do marvell chips preform? > Do they have performance limitations like 3132s? .. They don't seem to have any significant bottlenecks, so performance is limited only by the bus-width for the card/slot into which it gets inserted. Up to a point, somewhere in the mid-100's of MBytes/second. And the PCIe 7042 / PCI(x) 6042 chips handle FIS-based switching, plus all of the other SATA bells and whistles, including ATAPI. I think the only significant thing that's missing now is power-management, which probably isn't that hard to add now that there are other in-kernel SATA drivers that include some PM functionality. Cheers