Configuring and troubleshooting an Emulex adapter on Linux

This section describes Emulex adapter settings that can be changed based on the kernel, distribution, and IBM server hardware you are attaching to the DS6000™. It also describes modifications to configuration parameters.

Before you proceed, determine the kernel version of the Linux distribution that you are running.

Type the uname -r command to display the kernel version that you are running.

The output displays 2.4.x or 2.6.x, where x represents the maintenance and fix level for the installed distribution.

Note: If your Emulex driver loads at system start, run the mkinitrd command to build a new ramdisk device to reflect this change. Also run the zipl utility to update the initial program load record to point to the new ramdisk device.

For Emulex adapter cards running in RHEL3U5, LUN 0 might be missing from the list of available LUNS. Add the following options to the /etc/modules.conf file as a workaround for this issue.

Edit the /etc/modules.conf file.
If the value lpfc, lpfc_inq_pqb_filter=0x1 is not present, add it and save the configuration file.
Use your normal procedure to reload the driver settings. For example, use the modprobe -r command to remove a driver and the modprobe to install a driver.