[OpenIndiana-discuss] New Wiki page for adding a Windows GRUB entry

[Jean-Pierre]

Hi,

Bryan N Iotti wrote:
> Hi all,
>
>    Had some free time and thought that this page might be a useful addition to the OI Wiki:
>
> http://wiki.openindiana.org/oi/Add+a+GRUB+entry+for+a+Windows+installation+residing+on+a+separate+disk
>
> If you have time, please read it and tell me if there are any issues/omissions etc.
>

I will not comment on your page which is about a
configuration which I have never used.

Below is what I have just written about a triple
boot on a single disk (laptop users do not want to
carry external disks).

I leave it to an english speaker to merge this proposal.

Triple booting Windows, Linux and OpenIndiana installed on the same disk.

FIXME : The Windows wording for partition is volume and the OpenIndiana
one is slice.

This configuration may be useful for a laptop with no easy access to an
external disk. It is based on using the OpenIndiana bootloader, which is
the only one able to boot the three systems.

1) Backup important informations present on the computer. Make images
of the partitions you cannot easily rebuild, such as tool partitions
preinstalled by the vendor.

2) Shrink Windows, if already installed

This is easily done by Gparted which is present on most live-CD/DVD/USB
installers for Linux and OpenIndiana

3) Create the necessary partitions

This is also done by Gparted. Best to separate the system partitions and
you user data partitions. You need :

- one or two Windows system partitions
- at least three Linux partitions (root, home and swap)
- an OpenIndiana partition
- one or more user data partitions

This is clearly more than four partitions, so you have to use an extended
partition. However some vendors ship the computer with all four primary
partitions used, so you may have to delete one of them and replace it by
an extended partition, then reinstall the deleted one as a logical 
partition.

Define your partitions types as :
07 for NTFS
83 for Linux root and home
81 for Linux swap (do not use the usual 82)
bf for OpenIndiana
07 (NTFS) or even 0c (FAT) for user partitions to be shared by OSes

Make a copy of your partition layout. This must be exact to the sector 
if you need to rebuild your partitions. In particular the
OpenIndiana installer will destroy the partitions beyond the ninth,
and if you need more than nine partitions, you will have to recreate
them. A convenient tool for saving/restoring the partition layout
is sfdisk.

4) Install Windows if not already installed.

Make a copy of the MBR. You can do that from a live-CD/DVD/USB :

dd if=/dev/sda of=backup-mbr bs=512 count=1

FIXME : show the OpenIndiana equivalent of /dev/sda (/dev/dsk/c.t0d0p0)

5) Install Linux

Select ext3 (or ext2) as the file system type for Linux root. This will
have to be readable by the OpenIndiana installer.

This will probably install grub2 as its bootloader and overwrite the
current MBR. At this stage, you should be able to dual boot Windows and
Linux.

FIXME : the bootloader may have to be stored in the Linux boot
partition (problem encountered by Axelle ?)

Make a second copy of the MBR (can be done from the installed Linux),
and make a copy of the grub2 menu, which is found in
/boot/grub2/grub.cfg

6) Install OpenIndiana

FIXME : I do not know about multiple BEs

This will install grub as its bootloader and overwrite the current MBR

Make a third copy of the MBR and make a copy of the grub menu, which is
found on /rpool/boot/grub/menu.lst

Use an OpenIndiana text editor to insert a few lines in menu.lst to be
able to boot Windows and Linux. These lines must be inserted either just
before this one :
#---------- ADDED BY BOOTADM - DO NOT EDIT ----------
or inserted just after this one :
#---------------------END BOOTADM--------------------

The entry to be inserted for Windows is simple and may have been inserted
automatically by the OpenIndiana installer :

title Windows
         rootnoverify (hd0,0)
         chainloader +1

The entry to be inserted for Linux can be derived from the grub.cfg 
saved at step 5. Find a couple of consecutive lines from grub.cfg
beginning with "linux" and "initrd". Replace the linux header by
"kernel" and insert both lines in the menu.lst of OpenIndiana, so :

title Linux
        root (hd0,4)
        kernel /boot/vmlinuz... (copy the full line)
        initrd /boot/initramfs... (copy the full line)

The "4" in "root (hd0,4)" means that Linux was installed on the 5th
partition (the first logical partition). You have to adjust to your own
partition number for Linux root (take one from the partition number).

If you cannot install the systems in the above order (typically when
wanting to reinstall Linux), you have to get the OpenIndiana MBR from
the backup and reinstall it, and you have to update the menu.lst as
shown above.


---------------- begin example -----------
splashimage /boot/grub/splash.xpm.gz
foreground 343434
background F7FbFF
default 0
timeout 30

title Windows
	rootnoverify (hd0,0)
	chainloader +1

#---------- ADDED BY BOOTADM - DO NOT EDIT ----------
title OpenIndiana oi_151.1.8
findroot (pool_rpool,2,a)
bootfs rpool/ROOT/openindiana

splashimage /boot/solaris.xpm
foreground FF0000
background A8A8A8
kernel$ /platform/i86pc/kernel/$ISADIR/unix -B $ZFS-BOOTFS,console=graphics
module$ /platform/i86pc/$ISADIR/boot_archive
#---------------------END BOOTADM--------------------

title Linux
         root (hd0,4)
	kernel	/boot/vmlinuz-3.9.5-301.fc19.x86_64 
root=UUID=8f5bf987-2c2e-403c-8dab-8988142cb1cf ro rd.md=0 rd.lvm=0 
rd.dm=0  vconsole.keymap=fr rd.luks=0 vconsole.font=latarcyrheb-sun16 
rhgb quiet
	initrd	/boot/initramfs-3.9.5-301.fc19.x86_64.img
---------------- end example -----------