SAN LUN is not showing after RHEL re-installation

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux (RHEL)
  • Emulex HBA, Model Number A8002A

Issue

  • In this server have configured the shared LUN which is connected through FC
  • Due to some reasons have reinstalled the OS but before reinstalling removed the FC cables which is connected to the storage.
  • After the reinstallation of the OS is completed  again connected the FC cables and installed the multipath, fiberutils, HP-FC enablement etc. but could not see the LUNs which are assigned earlier.

Resolution

  • In log found the below error message:

    "lpfc: Unknown parameter `netxen_nic

  • Please modify the contents of existing modprobe.conf file as shown below:

========== Current modprobe.conf =============

options lpfc lpfc_lun_queue_depth=16 lpfc_nodev_tmo=30 lpfc_discovery_threads=32install netxen_nic /bin/true

install nx_xport /sbin/modprobe nx_nic || /sbin/modprobe nx_xport

========================================

========= Modified modprobe.conf =============

options lpfc lpfc_lun_queue_depth=16 lpfc_nodev_tmo=30 lpfc_discovery_threads=32
install netxen_nic /bin/true
install nx_xport /sbin/modprobe nx_nic || /sbin/modprobe nx_xport

========================================

  • After changes made on modprobe.conf please reboot your system and check whether the assign LUN are detected.

Root Cause

  • There was a syntax issue in modeprobe.conf as mentioned in Resolution section

Diagnostic Steps

Please provide the below details:
1) Which SAN storage you are using (Make & Model).
2) Which HBA Card you are using on server side (Make & Model).
3) What is the size of the LUN you assigned on the server.
4) How did you scanned the new LUN on the server, please provide the error message if any.
5) Any changes did on FC Switch Zoning side.
6) Whether link is blinking on HBA card.

This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. To give you the knowledge you need the instant it becomes available, these articles may be presented in a raw and unedited form.

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.