Difference between revisions of "Bootloaders for Linux and Dual Boot Handling"
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Revision as of 20:37, 22 May 2007
. /\_/\ section: . ____/ o o \ . /~____ =ø= / Linux Bootloaders and Dual Boot Handling . (______)__m_m) v0.48 . ______________________________________________________________________________ . . grub - grub is a bootloader for x86 arch linux . lilo - lilo is a bootloader for x86 arch linux . redboot - for ARM, MIPS, MN10300, PowerPC, Hitachi SHx, v850, and x86 . isolinux - linux bootloader that operates off ISO 9660/El Torito CD-ROMs . osl2000 - commercial bootloader + menu for windows, linux, others . bootpart - WinNT add partitions to boot menu, windows, os/2, or linux . loadlin - Boots Linux from within DOS, comes with many distributions . chos - graphical boot manager appearing in some distributions . bootmagic - a commercial boot manager by PowerQuest . system comman - a commercial boot manger 'system commander' . ______________________________________________________________________________ . . Bootloaders / boot managers may be installed to the following: . (1) MBR - The Master Boot Record . (2) The First Sector of the Boot Partition . . The master boot record is a reserved area on your hard drive that is . automatically loaded by your computer's BIOS. It is the first place that a . bootloader can take control of the boot process. . . Use the First Sector of the Boot Partition for a second bootloader. For . example, you may have GRUB or LILO on your MBR, and BOOTPART on your First . Boot Secotor since GRUB and LILO are unable to directly launch Windows NT. . . Information about the filesystem as a whole is contained on the Superblock. . The Superblock of the First Boot Partition is where the bootloader is . installed to when another bootloader is on the MBR. . . .oOo. boot loader support and frequently asked questions .oOo. . . Q. After installing or reinstalling Windows XP, grub no longer appears on boot . so I can't get to my Linux operating system on my dual boot system. . . A. (1) Using a boot floppy: . . There are more than one way to approach this issue. If you created a boot . floppy (such as with Redhat) simply boot from the floppy and execute the . command: 'grub-install /dev/hda' (hda or appropriate drive). . . (2) Using Fedora Core 1.0 Installation CD Disc 1 . . Boot off Fedora CD #1 in rescue mode. When prompted, select the . appropriate keyboard layout. When asked to set up network, just skip. . Lastly, you will be asked how to mount your Fedora install, choose the . default option (OK) which mounts it read-write. Then you should be taken . to the rescue shell. At the shell type the following commands: . . chroot /mnt/sysimage . . This makes grub think that your system booted normally by giving you a . chrooted shell. . . /sbin/grub-install /dev/hda . . Assuming that your installation was to harddrive A, this installs grub onto . the MBR. . . Press CNTRL-D twice or type 'exit' + Enter twice. . . Your system will reboot. Remove the Fedora installation CDROM and grub . should take it from there. . . Q. My Windows 98 installation is now showing up in the GRUB boot menu after I . had to install grub into the MBR again. . . A. Open the grub.conf file in a text editor. For example: . . vi /boot/grub/grub.conf . . Edit the boot entries to ensure that the correct partition is assigned to . Windows 98. Multiple Windows operating systems are not handled by lilo and . grub without chain-loading. I've used BootPart 2.20 (not on the MBR) to . handle more than one Micro$oft OS on a single harddrive. BootPart is . available at www.winimage.com to download. . . BootPart is an easy tool for adding additional partitions to the Windows NT . multi boot menu. You can use it to add the OS/2 boot manager or a Linux . partition. Bootpart 2.50 is free and also compatible with Windows NT, . Windows 2000 and Windows XP. . . Q. How do I get Linux to work with Bootpart 2.50 using the lilo boot loader? . . A. Method 1: Install Lilo on the MBR and BootPart on the First Sector . Method 2: Install BootPart on the MBR and Lilo on the First Sector . . For Linux, you can install Lilo at the beginning of the Linux partition . and then add the Linux partition with BootPart: . . When you install Linux or run liloconfig, select "Superblock of the root . linux partition" as the location for Lilo. On the Linux box, this added . the line "boot=/dev/sdb4" into the file /etc/lilo.conf . . This method puts Bootpart on the MBR and lilo on the First Sector. It is . possible to have lilo on the MBR and Bootpart on the First Sector also. . . Q. How do I get Linux to work with Bootpart using Grub (linux + winNT/XP)? . . A. Method 1: Install GRUB on the MBR and BootPart on the First Sector . Method 2: Install BootPart on the MBR and GRUB on the First Sector . . There is more information on using Method 2, however, I prefer Method 1. . . Method 1 will cause the PC to boot to the GRUB menu first, offering the . options of Linux or Microsoft. When Microsoft is selected the 'NTLDR' . bootloader or BootPart displays a menu with two Microsoft Operating . systems. . . (this information shall be revised, it is designed for 3 os's) . . (proceed at your own risk!) . . . . . . . . . .