Monday, January 2, 2012

ESXi 5 host loses lun connectivity after reboot

Issue: Every time the host is rebooted the host loses datastore connections and does not see any luns.
Other similar servers do not have this issue which are running the ESXi 5.0 and these hosts were upgraded at the same time with the same software.

Symptoms: We have to uncheck the override switch failover for the nic teaming assigned for iscsi portgroup and then again check them back, rescan for datastores then the host sees the datastore.

Resolution:changed the nic teaming policy to keep one nic as standby instead of unused for both the iscsi portgroups. Reboot the host. Issue Resolved.
More detailed explanation here: http://vmtoday.com/2012/02/vsphere-5-networking-bug-affects-software-iscsi/