Red Hat Knowledgebase

Release Found: Red Hat Enterprise Linux 4

Unlike previous releases of Red Hat Enterprise Linux, setting up multiple LUNs in Red Hat Enterprise Linux 4 uses a different file from the usual /etc/modules.conf file. In Red Hat Enterprise Linux 4 the file /etc/modprobe.conf is used.

To setup multiple LUNS, the option used would be options scsi_mod max_luns=xxx. Note the difference in previous Red Hat Enterprise Linux versions where the option would be options scsi_mod max_scsi_luns=xxx.

Listed below are the steps to configure multiple LUNs in Red Hat Enterprise Linux 4:

1. In /etc/modprobe.conf add the line below:

   options scsi_mod max_luns=xxx

   (add the number of LUNs to support in place of xxx)

2. Build the initial ramdisk to implement the change

   mkinitrd -f /boot/newimage-2.6.xx 2.6.xx

   (add the exact kernel version you have in place of xx)

3. Reboot the system. After the reboot, the LUNs should appear.