A customer reinstalls the Red Hat Enterprise Linux Server release 5.5 OS and then installs the UltraPath software. After the host is restarted, the host cannot discover virtual disks. The host cannot automatically upload the UltraPath driver and discover virtual LUNs, and Linux with UltraPath is not displayed on the startup screen.
Step 1 Manually upload the UltraPath driver. LUNs can be successfully discovered but Linux with UltraPath is still not displayed on the startup screen. Step 2 Update title Linux with UltraPath from /boot/grub/menu.lst to /boot/grub/grub.conf. Linux with UltraPath is displayed on the startup screen and the UltraPath driver is automatically uploaded.
The Red Hat OS boots from the /boot/grub/grub.conf file. menu.lst will be changed after the UltraPath software is installed. Usually, the changes to menu.lst is automatically updated in the grub.conf file. In this case, the menu.lst property displayed is -rw-------1 root root 830 Oct 20 14:25 /boot/grub/menu.lst, -rw-------1 root root 830 Oct 20 14:25 /boot/grub/menu.lst which indicates that the changes to menu.lst is not updated in the grub.conf file. Therefore, title Linux with UltraPath is not displayed when the OS starts and the UltraPath driver cannot be automatically uploaded. The possible causes to the fault that the symbol link from menu.lst to grub.conf is damaged are as follows: 1. The OS is damaged during installation. 2. At least one installation or uninstall process of the UltraPath software fails. 3. The UltraPath software has been successfully uninstalled once at least. Usually, menu.lst has the following symbol link property: [root@localhost grub]# ls -l /boot/grub/menu.lst lrwxrwxrwx 1 root root 11 Feb 3 2010 /boot/grub/menu.lst -> ./grub.conf
In the current OS, if UltraPath is uninstalled, menu.lst can be recovered but the recovered menu.lst is not a symbol link of grub.conf, which causes that the OS fails to be started. In this case, you can: 1. Manually update menu.lst to grub.conf after the UltraPath software is uninstalled. 2. Upgrade the UltraPath software.