The system is running CentOS 4.2 with latest updates and the RAID is running with 3WARE 9550SX with 8 hard drives/RAID50 configuration.
Here is the partition information:
# parted /dev/sda print
Disk geometry for /dev/sda: 0.000-2288754.000 megabytes
Disk label type: gpt
Minor Start End Filesystem Name Flags
1 0.031 101.972 ext3 boot
2 101.975 4102.536 ext3
3 4102.537 6149.876 linux-swap
4 6149.876 2288753.983 ext3
GRUB v1.92 source code is downloaded and compile with yacc links to bison (otherwise the compilation will fail).
grub-install script seems to have an typo. It looks like in line 213 of util/i386/pc/grub-install.in, `--modules' should be '--modules' (the back tick should be just a single quotation mark).
Here is the contents of /boot/grub (it has legacy grub because I don't want to remove it until I'm sure that v1.92 works with GPT):
ls /boot/grub/
acorn.mod fat.mod kernel.img splash.xpm.gz
affs.mod fat_stage1_5 _linux.mod stage1
amiga.mod ffs_stage1_5 linux.mod stage2
apple.mod font.mod loopback.mod sun.mod
boot.img fshelp.mod ls.mod terminal.mod
boot.mod fs.lst minix.mod terminfo.mod
cat.mod gpt.mod minix_stage1_5 test.mod
_chain.mod grub.cfg moddep.lst timeout.mod
chain.mod gzio.mod _multiboot.mod ufs2_stage1_5
cmp.mod halt.mod multiboot.mod ufs.mod
command.lst hello.mod normal.mod vbeinfo.mod
configfile.mod help.mod pc.mod vbe.mod
core.img hfs.mod play.mod vbetest.mod
default.mod hfsplus.mod pxeboot.img vesafb.mod
device.map iso9660.mod reboot.mod vga.mod
diskboot.img iso9660_stage1_5 reiserfs_stage1_5 vstafs_stage1_5
e2fs_stage1_5 jfs.mod search.mod xfs.mod
ext2.mod jfs_stage1_5 sfs.mod xfs_stage1_5
Here is the script that I use to create bootable floppy that supports GPT:
#!/bin/bash
#This will create a GRUB2 boot floppy that supports GPT system:
grub-mkimage -d /boot/grub -v -o /boot/grub/core.img ls ext2 gpt pc linux _linux boot chain configfile default fshelp help
mke2fs /dev/fd0
mount -o loop -t ext2 /dev/fd0 /mnt/floppy/
mkdir -p /mnt/floppy/boot/grub
cp /boot/grub/boot.img /boot/grub/core.img /boot/grub/*.mod /mnt/floppy/boot/grub
cp -f /boot/grub/grub.cfg /mnt/floppy/boot/grub
grub-mkdevicemap -m /boot/grub/device.map
grub-setup -d /mnt/floppy/boot/grub -v -r '(fd0)' -m /boot/grub/device.map '(fd0)'
umount /mnt/floppy
And here is my configuration file:
# grub2 configuration file
#
linux (hd0,1)/vmlinuz-2.6.9-22.0.2.ELsmp ro root=/dev/sda2
initrd (hd0,1)/initrd-2.6.9-22.0.2.ELsmp.img
boot
And the device map:
# cat /boot/grub/device.map
(fd0) /dev/fd0
(hd0) /dev/sda
It turns out that in regular PC partition table (parted msdos label) (hd0,0) becomes (hd0,1) if you have GPT table partition.
Thanks to all the GRUB developers for this great software!!! Finally we have a boot loader that supports GPT!!!!
Let me know if anyone need any other information to get the GPT partitioned system booted from floppy.
Poe
ps: I'm adding an entry in the wiki. Please let me know if it's not appropriate.
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