When smart bios gets anoying
By nickyv on Sep 19, 2005
There are 2 options since Solaris with grub is installed on the system, we can wipe the boot record and force a boot from the default device or modify the grub menu.
Wiping the mbr - pro: easily done, cons if something goes wrong theres no way back
Modify Grub - pro: can revert back to default os, cons need hands on if things go wrong
This assumes you have a tftp server configured for jumpstart and are using dhcp, all you do is add the following to the menu on the system to be reinstalled in /boot/grub/menu.lst. Typically I place the entry below the timeout entry ie as the first entry and set the default boot entry to 0
# # default menu entry to boot default 0 # # menu timeout in second before default OS is booted # set to -1 to wait for user input timeout 10 # dhcp root (nd) kernel /I86PC.Solaris_11-15/multiboot kernel/unix - install dhcp -B console=keyboard,install_config=IP_INSTALL_SERVER:/PATH_TO_JUMPSTART_CONFIG/MACHINE_NAME,sysid_config=IP_INSTALL_SERVER:/PATH_TO_JUMPSTART_CONFIG/MACHINE_NAME,install_media=IP_INSTALL_SERVER:/PATH_TO_INSTALL_MEDIA/OS_BUILD,install_boot=IP_INSTALL_SERVER:/PATH_TO_INSTALL_MEDIA/OS_BUILD/boot module /I86PC.Solaris_11-15/x86.minirootThe entries for kernel and module can be found in the menu.lst.MAC-ADDRESS on your tftp server after running add_install_client. The above entry is used when you have a jumpstart profile, to use an interactive install (why?) the entries would be as follows
# # default menu entry to boot default 0 # # menu timeout in second before default OS is booted # set to -1 to wait for user input timeout 10 # dhcp root (nd) kernel /I86PC.Solaris_11-15/multiboot kernel/unix - install dhcp module /I86PC.Solaris_11-15/x86.miniroot
Simply what happens is, dhcp tell grub to configure the network device based on the dhcp settings. We set the root filesystem to be the network devices tftp directory. Load the kernel from the directory with the args of install and dhcp .
this will only work if you have a network device which is supported by the mini root.