How to prevent WWNN duplication on ActiveRaid and mRaid Controllers

Here are the steps how to duplicate the WWNN and how to fix it if the WWNN was already duplicated.

-A controller plugged in into slot A (the master controller) will update the controller in slot B (slave controller), this update include the WWN and WWPN from the master controller.

 

Example: (original WWNN)

activeraid 1 = ctrl A WWN 50:02:2C:10:01:0C:94:00 and ctrl B WWN 50:02:2C:10:01:0C:94:01 

activeraid 2 = ctrl A WWN 50:02:2C:10:01:15:74:00 and ctrl B WWN 50:02:2C:10:01:15:74:01

 

-How to duplicate WWNN:

step 1. Remove ctrlA from activeRaid 1 and ctrl B from activeRaid 2 

step2. swap controllers (cross controllers)

 

-result:

the ctrl B from activeRaid 2 now is the master controller in activeRaid 1 so it will update the WWN on ctrl B 

the ctrl A from activeRaid 1 now is the slave controller in activeRaid 2 will be updated for ctrl A.

 

Example (WWNN duplicated after cross controllers from system 1 to system 2)

activeraid 1 ctrl A (old ctrl B) WWN 50:02:2C:10:01:15:74:00 and ctrl B WWN 50:02:2C:10:01:15:74:01 

activeraid 2 ctrl A WWN 50:02:2C:10:01:15:74:00 and ctrl B (old ctrl A) WWN 50:02:2C:10:01:15:74:01

 

Recommendation: 

- Don't cross controllers from system to system.

Note: if you already duplicated the WWNN Contact Active Storage support immediately