topic FAS2020:Luns not visible after takeover in ONTAP Hardware

FAS2020:Luns not visible after takeover

shashidhargc — Thu, 05 Jun 2025 06:56:03 GMT

Hi,

Ther's FAS 2020, ith controller1 sharing a few LUNs to a Windows machine. Controller2 is standby. Recently there was Controller replacement on Controller2. After the replacement

when cntrllr2 takes over cntrllr1, luns are not visible.

CNTRL01> fcadmin config

Local

Adapter Type State Status

---------------------------------------------------

0a target CONFIGURED online

0b initiator CONFIGURED. online

CNTRL02> fcadmin config

Local

Adapter Type State Status

---------------------------------------------------

0a initiator CONFIGURED online

0b target CONFIGURED online

Need help, kindly let me know wat settings can i check to troubleshoot this issue.

Re: FAS2020:Luns not visible after takeover

rickymartin — Sun, 24 Apr 2011 14:01:26 GMT

Sounds a little like the change in the serial number of the new controller has changed the serial number of the LUN's (depends on how the upgrade was done see https://kb.netapp.com/support/index?page=content&id=1011538), or possibly that the WWNN or WWPN info has changed and the mapping back to the hosts via the SAN isnt right any more.

If you havent already done so, raise a P1 case with NetApp support.

Re: FAS2020:Luns not visible after takeover

shashidhargc — Thu, 07 Mar 2013 12:35:00 GMT

Problem was solved after updating the WWPNs of new controller on to the SAN switch zones.

Guess the FE who replaced the controller forgot to do it.