[dm-devel] failover does not work with rdac device handler
Moger, Babu
Babu.Moger at lsi.com
Sat Oct 4 00:12:40 UTC 2008
Hi,
I have quick question.
I am trying to configure device mapper for my FC array (on my Linux box). I have passed all the arguments from /etc/multipath.conf(like vendor, model etc ..).
Discovery seems fine. But, failover is not working. I am seeing the following error.
"device-mapper: multipath: Cannot failover device because scsi_dh_rdac was not loaded."
Is it required to add vendor id and model id anywhere else to support this device?
Thanks
Babu Moger
-----Original Message-----
From: dm-devel-bounces at redhat.com [mailto:dm-devel-bounces at redhat.com] On Behalf Of Moger, Babu
Sent: Wednesday, October 01, 2008 4:48 PM
To: device-mapper development; linux-scsi at vger.kernel.org
Subject: [dm-devel] failover does not work with rdac device handler
Hi All,
I am new to the device mapper and just thought I will set-up device mapper on our arrays. I am using the latest kernel 2.6.27.rc6 and got the latest multipath-tools from upstream.
I updated /etc/multipath.conf with all the information (vendor, product, hardware_handler, prio etc ...). Note that my device is not part of rdac_dev_list.
Discovery worked fine. "multipath -ll" displays all the information. I can see that it is picking up rdac device handler.
But I found that for some reason failover/failback is not working. I am seeing following these messages.
"device-mapper: multipath: Cannot failover device because scsi_dh_rdac was not loaded."
I can see that scsi_dh_rdac driver is already loaded.
I did some more investigation. Found that failover works fine if I add vendor, model in rdac_dev_list (in file scsi_dh_rdac.c).
My question - is it required to add all the supported vendor and model names in rdac_dev_list?
Appreciate your responses.
Thanks
Babu Moger
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