Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269172AbUINHDh (ORCPT ); Tue, 14 Sep 2004 03:03:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269176AbUINHDh (ORCPT ); Tue, 14 Sep 2004 03:03:37 -0400 Received: from dialup-4.246.93.207.Dial1.SanJose1.Level3.net ([4.246.93.207]:45696 "EHLO nofear.bounceme.net") by vger.kernel.org with ESMTP id S269172AbUINHDf (ORCPT ); Tue, 14 Sep 2004 03:03:35 -0400 Reply-To: From: "C.Y.M." To: "'Jens Axboe'" Cc: , "'Alan Cox'" Subject: RE: Changes to ide-probe.c in 2.6.9-rc2 causing improper detection Date: Tue, 14 Sep 2004 00:03:09 -0700 Organization: CooLNeT Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcSaITGan1Q6QUCHRs6UAnWOXNOeEQABnuxA In-Reply-To: <20040914060628.GC2336@suse.de> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1498 Lines: 44 > > On Mon, Sep 13 2004, C.Y.M. wrote: > > After installing 2.6.9-rc2 on my PC today (x86 VIA Chipset > motherboard and > > Athlon XP CPU), The IDE detection during boot in probing > for ide2-5 and > > displaying errors, and the hard drives that it does find > are telling me that > > "hda: cache flushes not supported" (when they are displayed > as supported > > when using 2.6.9-rc1. > > Your drive doesn't advertise FLUSH_CACHE support, the model > for when we > use these commands changed between -rc1 and -rc2. This > essentially means > that you have to turn off write back caching for safe operations on a > journalled drive. > > Alan, I bet there are a lot of these. Maybe we should consider letting > the user manually flag support for FLUSH_CACHE, at least it > is in their > hands then. > > -- > Jens Axboe > Thanks for the explanation. I can understand that some of the older drives will not support FLUSH_CACHE which is acceptable. On another note, since most computers only have IDE0 and IDE1 slots, is there a way to prevent the probe from returning errors on boot when looking for IDE2 to IDE5? Perhaps a kernel configuration option asking how many IDE's are expected to probe (defaulting to two)? Best Regards, C.Y.M. - 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/