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Wrong WWN leads that the host cannot visit the storage

Publication Date:  2012-10-18 Views:  88 Downloads:  0
Issue Description
On the X site deployment there is a host cannot find the storage.
Alarm Information
Handling Process
Ask the engineer to add the right WWN and the problem is solved.
Root Cause
Check the storage configuration, which is set host group and host. Ports and lun are distributed in the host. The host and the storage are connecting by optical link. The system is SUSE10sp2. Ultrapath is installed in the host.
By checking port_name under /sys/class/fc_host/hostX, WWN of host HBA can be seen. We find the WWN of storage and host are not same.
Configure the right WWN.