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Re: [dm-devel] RHEL 6 I/O error messages during booting



On Thu, May 05 2011 at  6:58am -0400,
Christian May <christian_may de ibm com> 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

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