Help converting grub-legacy to grub2
I currently boot Mandriva-2009.1 with grub-0.97 & would like to
boot it with grub-1.96. I installed the Mandriva grub2-1.96-1 RPM package but can't get grub2 to boot my system. Here is what I tried: /usr/sbin/grub-install --grub-setup=/bin/true /dev/sdb boot to grub-legacy prompt (grub>) grub> root (hd0,0) ..grug-legacy ext3 partition /dev/sdb1 grub> kernel /boot/grub/core.img ..This gives error grub> boot Since the above doesn't work I haven't tried: /usr/sbin/grub-install /dev/sdb update-grub -o /boot/grub/grub.cfg I fear the 2nd set of commands won't boot either & mess up he existing grub-legacy boot sector. The 1st command set leaves the grub-legacy boot sector in place so I can still boot Mandriva. If anyone has Mandriva-2009.1 booting with grub2, please let me know how you did it. |
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What error did you get?? Quote:
The grub.cfg file is needed by grub2.you can also generate the grub.cfg file automatically by the command Code:
grub-mkconfig -o /boot/grub/grub.cfg You do not have to do grub-install unless you want to replace your existing boot loader with grub2. anyway keeping a backup of your /boot is a good idea..... More details can be found at : http://grub.enbug.org/TestingOnX86 |
Help converting grub-legacy to grub2
grub> kernel /boot/grub/core.img ..This gives: Error 15: File not found
I did not make a "grub.cfg" because I am trying to "manually" boot grub2 from the boot prompt (grub>) after booting my grub-legacy (floppy) boot disk to the grub shell Actually, I did make a grub.cfg file but it only contains a "global section" & no "menuentry section(s)" That is because there is no existing /etc/default/grub file. If I can get grub2 to boot manually then I'll create a /etc/default/grub configuration file & run 'update-grub" to get a proper grub.cfg. ********************************************************************** Also, since posting this thread, I succeeded in making a grub2 "boot-floppy. It boots to a grub2 shell prompt but so far I cannot get it to actually boot Mandriva ..Grub2 complains: "unknown filesystem" Here are the commands I used to make the boot-floppy": mount -t ext2 /dev/fd0 /mnt/floppy /usr/sbin/grub-install--root-directory=/mnt/floppy /dev/fd0 Here are the commands I am trying to boot my hdd with from the floppy: linux (hd0)/vmlinuz-2.6.30 root=/dev/sdb2 ro resume=/dev/sdb5 Note: Grub2 complains about unknown filesystem even though vmlinuz is on an ext3 partition (/dev/sdb1) & the rootfs files are on an ext4 partition (/dev/sdb2) linux (hd0,1)/vmlinuz-2.6.30 root=/dev/sdb2 ro resume=/dev/sdb5 Note: Grub2 complains about unknown device vmlinuz is on an ext3 partition (/dev/sdb1) & the rootfs files are on an ext4 partition (/dev/sdb2) Here is the output fo the grub2 shell "ls" command: grub> ls -l Device fd0: filesystem type ext2 Device hd0: partition table Device hd1: partition table Device hd2: partition table ************************************************************************ Thank you for replying to my post. |
Grub-legacy prompt -> call the grub2 image -> end up in grub2 prompt (since there is no grub.cfg)
Well you are trying to do this rt?? make sure you give the root command before the kernel command in grub-legacy prompt. You might already know this but beware GRUB 2 counts partitions from 1 and not from 0 like GRUB Legacy! So, increase the numbers |
Solved: Help converting grub-legacy to grub2
I finally succeeded in booting from a grub floppy & went on to install grub2 on my hard drive.via grub-install.
Here are the commands I used to install Grub2: grub-install --modules="linux boot" /dev/sdb ..install to hard-drive grub-install --modules="linux boot pc" --root-directory=/mnt/floppy /dev/fd0 ..install to floppy. The problem was that Grub2 was not loading certain modules. After I loaded the necessary modules to /boot/grub/core.img, everything worked fine. Here is my current output from the lsmod command: grub> lsmod _chain biosdisk pc ..partmap module ext2 ..access to ext2 ext3 & ext4 filesystems fshelp boot ..starts boot process linux ..used tobacess Linux rootfs _linux ..used to access Initrd files normal ..Normal mode Grub Shell Thank you all for reading this post. |
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