From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: only one drive in a port multiplier system is being recognized Date: Mon, 12 Nov 2007 11:58:54 +0900 Message-ID: <4737C16E.3070607@gmail.com> References: <4730E312.3090900@navy.mil> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from rv-out-0910.google.com ([209.85.198.191]:46739 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754308AbXKLC7C (ORCPT ); Sun, 11 Nov 2007 21:59:02 -0500 Received: by rv-out-0910.google.com with SMTP id k20so1050287rvb for ; Sun, 11 Nov 2007 18:59:02 -0800 (PST) In-Reply-To: <4730E312.3090900@navy.mil> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: gsh@usno.navy.mil Cc: linux-ide@vger.kernel.org Greg Hennessy wrote: > I have a LYCeSATA-4x pci card that is port multiplier compatible (it > works fine > under win xp) that is only showing one of 5 attached drives when > attached to > a Redhat 5 computer, with both 2.6.18-8.1.15.el5 and 2.6.23.1. > The SATA link shows as up for the one recognized drive, the other four > drives show the link down. > Any sugguestions as to what may be the problem? Stock 2.6.23.1 doesn't have PMP support. 2.6.24 will. You need patches from the following page. http://home-tj.org/wiki/index.php/Libata-tj-stable -- tejun