VMware: How to check HBA firmware version without rebooting ESX host

step1: ssh ESXi;

step2: /proc/scsi/qla2xxx or lpfc820;

step3: #ls -lia;

step4: cat 3 or cat 4;

http://blog.vmpros.nl/2011/02/25/vmware-how-to-check-hba-firmware-version-without-rebooting-esx-host/