From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: AHCI problem with hotplug Date: Tue, 30 Dec 2008 09:38:54 +0900 Message-ID: <49596D9E.3040904@kernel.org> References: <494178E3.6030305@cybernetics.com> <49588784.4020808@kernel.org> <4958E3DC.7080009@cybernetics.com> <49591710.7040102@shaw.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:50541 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752416AbYL3AjD (ORCPT ); Mon, 29 Dec 2008 19:39:03 -0500 In-Reply-To: <49591710.7040102@shaw.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Robert Hancock Cc: Tony Battersby , Jeff Garzik , IDE/ATA development list Robert Hancock wrote: > Tony Battersby wrote: >>> The BIOS could be tristating the ports. Does it work if you issue >>> manual rescan (echo - - - > /sys/class/scsi_host/hostN/scan)? >>> >> No luck. I get: >> >> ata1: hard resetting link >> ata1: SATA link down (SStatus 0 SControl 0) >> ata1: EH complete >> >> And the drive isn't seen. > > Well, if the controller reports link down there likely isn't much the > kernel can do about it. I assume that ata1 is in fact where that drive > gets detected if it's plugged in at boot - you could try all the other > hosts to be sure.. This is consistent with the BIOS tristating those ports. I don't remember the name of the register. I'll look it up later. Thanks. -- tejun