[dm-devel] failover does not work with rdac device handler
Moger, Babu
Babu.Moger at lsi.com
Wed Oct 1 21:47:58 UTC 2008
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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