Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 12 Oct 2001 16:52:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 12 Oct 2001 16:52:40 -0400 Received: from D8FA50AA.ptr.dia.nextlink.net ([216.250.80.170]:26035 "EHLO tetsuo.applianceware.com") by vger.kernel.org with ESMTP id ; Fri, 12 Oct 2001 16:52:30 -0400 Date: Fri, 12 Oct 2001 13:28:02 -0700 From: Mike Panetta To: linux-kernel@vger.kernel.org Cc: andre@linux-ide.org Subject: Re: IDE Hot-Swap, does it work?, Conspiracy is afoot! Message-ID: <20011012132802.B6355@tetsuo.applianceware.com> Mail-Followup-To: Mike Panetta , linux-kernel@vger.kernel.org, andre@linux-ide.org In-Reply-To: <20011011131042.A2780@tetsuo.applianceware.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20011011131042.A2780@tetsuo.applianceware.com>; from mpanetta@applianceware.com on Thu, Oct 11, 2001 at 01:10:42PM -0700 Organization: ApplianceWare X-Mailer: mutt (ruff! ruff!) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ok, I have played with this a bit since I have recieved no real respose other than one other person having the same question, here is what I have found out... I have a piece of hardware that does have hot-swap IDE chassis on it, so atleast the IDE bus xcvers should be able to handle the swapping, as the connection to the drive is disabled before the can comes all the way out of the slot. - I can remove a drive while the system is on and I have a software raid 5 on the 4 drives, everything is ok after about 2 minutes the system recovers and the software raid fails the drive I removed. This makes sense. - After a few minutes I replace the drive I had just failed by removing it, and I try to readd it to the system via raidhotadd. One of 2 things happens in this instance, depending on what kernel I have loaded. - If I have kernel 2.4.2-2 loaded (a stock redhat 7.1 kernel), the drive reappears, and can be added back to the raid (and is added back). - If I am running kernel 2.4.10 or any later (AC or non) the machine fails to ever be able to read from the disk again. I cannot readd the disk to the arry, nor can I fdisk it (or access it in any other way). - None of this solves the adding of a drive to the system where there was none before boot... I tried the hdparm -R stuff but its useless and hangs my box no matter what I give it as paramaters. This of course may be because I do not know how to use it very well... If anyone can help it would be greatly appreciated. I am really beginning to believe that IDE will never be as capable as SCSI in this reguard, atleast not in linux, espically as any (even if it was broken) support that used to be in the kernel has disappeared. Please someone convince me otherwise! Atleast point me in the correct direction as to what in the kernel would have to be changed to make this work... Thanks, Mike -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/