From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: RHEL 6 I/O error messages during booting Date: Thu, 5 May 2011 09:38:09 -0400 Message-ID: <20110505133809.GA9548@redhat.com> References: Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Christian May Cc: device-mapper development List-Id: dm-devel.ids On Thu, May 05 2011 at 6:58am -0400, Christian May wrote: > Hi, > > I'm new to this community so maybe my question is alreayd answered/solved. > In that case please let me know how... > > I have several IBM blades running RHEL6 and RHEL 6.1 attached via FC > switch to different FastT storage servers (prefered/non-prefered pathes). > During booting I've noticed billions of I/O error messages which extend > the boot process. I found that the scsi_dh_rdac > driver is build into the initramfs, so it should be available when the > system is recognizing the SCSI LUNs. When taking a look to the messages > I found this statement "kernel: rdac: device handler registered" after the > SCSI LUNs were recognized?! > > Any ideas? The scsi_dh_rdac module is loaded after the FC driver. This is a known issue (happens for scsi_dh_emc too). Mike