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* docs/grub.texi (Multi-boot manual config): New section.

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Vladimir 'phcoder' Serbinenko 2012-06-16 00:32:59 +02:00
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@ -1,3 +1,7 @@
2012-06-16 Vladimir Serbinenko <phcoder@gmail.com>
* docs/grub.texi (Multi-boot manual config): New section.
2012-06-15 Vladimir Serbinenko <phcoder@gmail.com>
Avoid slow read-back from VRAM.

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docs/grub.texi
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@ -1056,6 +1056,7 @@ need to write the whole thing by hand.
@menu
* Simple configuration:: Recommended for most users
* Shell-like scripting:: For power users and developers
* Multi-boot manual config:: For non-standard multi-OS scenarios
* Embedded configuration:: Embedding a configuration file into GRUB
@end menu
@ -1485,6 +1486,101 @@ than zero; otherwise 0.
@end table
@node Multi-boot manual config
@section Multi-boot manual config
Currently autogenerating config files for multi-boot environments depends on
os-prober and has several shortcomings. While fixing it is scheduled for the
next release, meanwhile you can make use of the power of GRUB syntax and do it
yourself. A possible configuration is detailed here, feel free to adjust to your
needs.
First create a separate GRUB partition, big enough to hold GRUB and
few OS network installers you want to use. Mount this partition on
/mnt/boot and disable GRUB in all OSes and manually install
self-compiled latest GRUB with:
@code{grub-install --boot-directory=/mnt/boot /dev/sda}
In all the OSes install GRUB tools but disable installing GRUB in bootsector,
so you'll have menu.lst and grub.cfg available for use. Also disable os-prober
use by setting:
@code{GRUB_DISABLE_OS_PROBER=true}
in /etc/default/grub
Then write grub.cfg as following in /mnt/boot/grub/grub.cfg:
@example
menuentry "OS using grub2" @{
insmod xfs
search -s root -l OS1 --hint hd0,gpt2
configfile /boot/grub/grub.cfg
@}
menuentry "OS using grub2-legacy" @{
insmod ext2
search -s root -l OS2 --hint hd0,gpt3
legacy_configfile /boot/grub/menu.lst
@}
menuentry "Windows XP" @{
insmod ntfs
search -s root -l WINDOWS_XP --hint hd0,gpt4
gptsync hd0 4+7
ntldr /ntldr
@}
menuentry "Windows 7" @{
insmod ntfs
search -s root -l WINDOWS_7 --hint hd0,gpt5
gptsync hd0 5+7
ntldr /bootmgr
@}
menuentry "FreeBSD" @{
insmod zfs
search -s root -l freepool --hint hd0,gpt6
kfreebsd /freebsd@@/boot/kernel/kernel
kfreebsd_module_elf /freebsd@@/boot/kernel/opensolaris.ko
kfreebsd_module_elf /freebsd@@/boot/kernel/zfs.ko
kfreebsd_module /freebsd@@/boot/zfs/zpool.cache type=/boot/zfs/zpool.cache
set kFreeBSD.vfs.root.mountfrom=zfs:freepool/freebsd
set kFreeBSD.hw.psm.synaptics_support=1
@}
menuentry "experimental GRUB" @{
search -s root -l GRUB --hint hd0,gpt1
multiboot /experimental/grub/i386-pc/core.img
@}
menuentry "Fedora 16 install" @{
search -s root -l GRUB --hint hd0,gpt1
linux /fedora/vmlinuz lang=en_US keymap=sg resolution=1280x800
initrd /fedora/initrd.img
@}
menuentry "Fedora rawhide install" @{
search -s root -l GRUB --hint hd0,gpt1
linux /fedora/vmlinuz repo=ftp://mirror.switch.ch/mirror/fedora/linux/development/rawhide/x86_64 lang=en_US keymap=sg resolution=1280x800
initrd /fedora/initrd.img
@}
menuentry "Debian sid install" @{
search -s root -l GRUB --hint hd0,gpt1
linux /debian/dists/sid/main/installer-amd64/current/images/hd-media/vmlinuz
initrd /debian/dists/sid/main/installer-amd64/current/images/hd-media/initrd.gz
@}
@end example
Notes:
@itemize
@item Argument to search after -l is FS LABEL. You can also use UUIDs with -u UUID instead of -l LABEL
@end itemize
@node Embedded configuration
@section Embedding a configuration file into GRUB