From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: MCP55 disk activity LEDs don't flash Date: Sat, 06 Dec 2008 14:28:11 -0600 Message-ID: <493AE05B.2010707@shaw.ca> References: <493A8767.5030200@seiner.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from main.gmane.org ([80.91.229.2]:43070 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752696AbYLFU2Z (ORCPT ); Sat, 6 Dec 2008 15:28:25 -0500 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1L93lG-0006FV-1E for linux-ide@vger.kernel.org; Sat, 06 Dec 2008 20:28:22 +0000 Received: from s0106000c41bb86e1.ss.shawcable.net ([70.76.47.20]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 06 Dec 2008 20:28:22 +0000 Received: from hancockr by s0106000c41bb86e1.ss.shawcable.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 06 Dec 2008 20:28:22 +0000 In-Reply-To: <493A8767.5030200@seiner.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Yan Seiner wrote: > I have a 6 slot server case with a backplane. AFAICT the backplane is > passive and there are SATA cables that lead from the backplane to the mobo. > > The problem is that the disk activity LEDs for the slots don't flash at > all. The mobo is an ASUS M2N SLI Deluxe, which has the MCP55 controller. > > The drive activity LED which plugs into the mobo works just fine; the > individual LEDs for each of the drives don't flash - they just stay on. > Is there something I can enable to make them work? Or is the backplane > broken? The backplane may be expecting the host to control the LEDs. You'd have to check with the manufacturer to be sure. As for how it would do this, there's such a thing as enclosure management support in SATA, but the sata_nv driver doesn't support it. If there is a way to use it on that controller, only NVidia would know, since they've provided no documentation for their pre-AHCI controllers. Some AHCI controllers do have support for this..