Unable to increase lpfc_max_luns

Issue

• I followed the steps described in "What is the theoretical maximum number of sd* devices supported? " article to increase lpfc_max_luns.

• Add options lpfc lpfc_max_luns=2048 to /etc/modprobe.d/lpfc.conf, rebuild initramfs and reboot:

  # cat etc/modprobe.d/lpfc.conf 
  options lpfc_nodev_tmo=10
  options lpfc_lun_queue_depth=32
  options lpfc lpfc_max_luns=2048 <---
  
  # cat /sys/class/scsi_host/host7/lpfc_max_luns
  255 <--- Not changed.
  

• Add lpfc_max_luns=2048 to the kernel line in /etc/grub.conf and reboot:

  kernel /vmlinuz-2.6.32-431.20.3.el6.x86_64 ro root=/dev/mapper/vg_root-lv_root rd_NO_LUKS rd_LVM_LV=vg_root/lv_root LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 rd_LVM_LV=vg_root/lv_swap  KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet rd_NO_DM rhgb quiet lpfc_max_luns=2048
  
  # cat /sys/class/scsi_host/host7/lpfc_max_luns
  255 <--- Not changed.
  

• Increase of lpfc_max_luns is not working.