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When configuring an ESXi host for NVMe/FC, before you add it to a PowerStore appliance or cluster, you must change the NVMe Qualified Name (NQN), which is similar to an iSCSI Qualified Name (IQN), to the UUID format.
According to the Dell Technologies Host Connectivity Guide, SSH to each ESXi host using root credentials, and issue the following command (reboot required):
esxcli system module parameters set -m vmknvme -p vmknvme_hostnqn_format=0
To verify the host NQN was generated correctly after the reboot, use the following command:
esxcli nvme info get
Also, you must enable NVMe support on the NVMe-capable HBAs.
According to the Dell Technologies Host Connectivity Guide, depending on the NVMe HBA installed, issue the following commands with root privileges (reboot required):
For Marvell NVMe HBAs:
esxcli system module parameters set -p ql2xnvmesupport=1 -m qlnativefc
For Emulex NVMe HBAs:
esxcli system module parameters set -m lpfc -p lpfc_enable_fc4_type=3
Note: You must change the host NQN format parameter before adding the host in PowerStore Manager. Changing the vmknvme_hostnqn_format parameter after the host has already been added to the appliance changes its NQN, which causes the host to be disconnected from the array.