This is short notes on how I create a dual boot machine with Windows 8 and Slackware64. Both are 64-bit operating system and will be installed on UEFI-based computer with GPT disk layout.
Actually I do this around in earlier year 2013, so this article might not up to date. However it should work because we use general method.
In this article, i use:
- Microsoft Windows 8 64-bit, installation disc
- Slackware64 14.0, installation disc
- Lenovo Ideapad Z480
- USB disk
Note that I do the scenario (would be) mentioned because my machine is fresh and I will do it from scratch.
Lenovo Ideapad Z480 has following specification (main):
- Intel Core i7-3632QM
- RAM 4 GB
- HDD 1TB
- Video RAM NVidia GeForce GT640
However, I also give addition to RAM so in result I have 8GB RAM.
At default, it is not using UEFI so I activated UEFI capability.
I also convert the disk format from MBR to GPT, however I do this later.
The problem arise before me is the fact that the Windows 8 installation DVD not support UEFI yet. Therefore I cannot boot the DVD in UEFI.And also, Windows 8 cannot be installed on GPT disk, yet. At that time Slackware also does not support UEFI, yet. But, it can be installed in GPT partition, good thing to know. Therefore I need a bootable USB disk to boot Slackware then create everything I need for installing Linux.
The scenario in this article:
- Create partition
- Install Windows 8 while the disk still use MBR layout.
- Install Slackware64 14.0 with GPT disk
- Finalizing, installing and configuring bootloader
I use a companion Linux in bootable USB stick. I create a USB stick with UEFI capable. You can download it from here.
Make a partition for USB stick with FAT32 partition and boot flag enabled. You can use either gparted or gdisk (in Linux) to accomplish it.
Just extract what inside the archive to USB stick. Make sure there are two folders: EFI and Slackware64.
Step 1: Create Partition
Boot the machine using Windows installer DVD. I need to create a partition for MBR disk. In my case I create these primary partitions:
- boot partition, located on partition 1 with FAT32 file system, takes about 100MB.
- Reserved partition, used by Windows, create it for 350MB capacity.
- Windows partition, NTFS, I use 100GB
- Linux Partition, unallocated, I use 100GB
Those are the partition I need at the moment. The rest will be create at finalizing stage.
Here, once the Windows 8 installation DVD is booted, do normal installation routine. Once we got on media selection (where we install Windows), press [Shift] + F10. This will bring command prompt. Invoke following command:
Now we will do partitioning. I’m using only one disk, so the disk should be recognized as disk 0. Also, I don’t use GPT at this section, it would be after installation of Windows 8.
select disk 0
create partition primary size=100
format quick fs=fat32 label="System"
create partition msr size=350
format quick fs=ntfs
create partition primary size=100000
format quick fs=ntfs
create partition primary size=100000
Go to step 2.
Step 2: Installing Windows 8
Still using Windows 8 installation DVD, exit the command prompt. Now I’m refreshing the list so we will know all of the partition available.
I continue installing Windows like usual on partition 3.
Once the installation finish, go to step 3.
Step 3: Installing Slackware64
I need to do some preparation first. Therefore, there would be some subsections for this.
Convert MBR to GPT
Boot the USB stick.
Conversion is inherently risky. For safety, I backup the original configuration before converting the disk. The MBR itself is stored on the first sector of the disk and can be backed up with dd by:
dd if=/dev/sda of=backup.mbr bs=512 count=1
Then I run gdisk for disk on /dev/sda
Follow the option menu for conversion MBR to GPT, and I done.
Prepare the Installation Environment
Mount the USB stick. I accomplish this by invoking following command:
mount /dev/sdb1 /src
Invoke setup and adjust the setting like normal installation until you reach installation media stage.
Press ALT+F2 to switch to another screen (or another tty).
Install temporary system using USB stick. Invoke these commands:
installpkg -root /mnt [az]*/* cd
Now, back to our main setup and choose install from CD/DVD. Also, I won’t use LILO, instead I use ELILO. So I don’t install LILO.
After installation is finished, I don’t restart the machine immediately. Instead, I go to last step: Finalizing.
Step 4: Finalizing
First, make sure we are still boot the machine using USB stick, then load following command:
Also, I need to mount the boot partition
mount /dev/sda1 /mnt/boot/efi
Add Bootstrap to Slackware
I invoke following command. Note that these commands should be invoked as is, even a dot matters. If you remember, the Slackware is installed on 4th partition.
mount /dev/sda4 /mnt/root
cp -rvf /src/EFI /mnt/boot/efi
mv BOOT Slackware
mv bootx64.efi elilo.efi
cp /mnt/root/boot/vmlinuz-huge-3.2.29 .
And I configure the elilo.conf:
image = vmlinuz-huge-3.2.29
label = Slackware
root = /dev/sda4
And register boot so that machine can boot Slackware.
usr/bin/efibootmgr -c -L "XathryaSlackBoot" -l "\\EFI\\Slackware\\elilo.efi"
Add Bootstrap to Windows
Eject the Slackware installation disc and insert Windows 8 installation disc. I need to copy all files needed to boot EFI from Windows 8 disc.
mount /dev/sd1 /mnt/disc
cp -R /mnt/disc/efi/microsoft /mnt/boot/efi
That will copy “microsoft” folder and whole of it’s content to /mnt/boot/efi (which is my mounted efi boot partition).
Now, to create a bootstrap we first need to restart the machine and boot with Windows 8 installation DVD. What we will do is repair the Windows 8 EFI bootloader.
I do normal installation sequence method until I was prompted with list of volumes / partitions. Now press [Shift] + F10. A new command prompt appear.
Now invoke following command, which will bring me to diskpart (disk partition) program:
My disk is only one, so I will use disk 0.
sel disk 0
Because the EFI partition is the very first partition (/dev/sda1), it should be registered as earlier volume. However, it doesn’t have drive letter, so I will give it one.
sel vol 1
assign letter b:
The attempt is successful and I’m prompted by a message which tell me that the volume has been assign to letter B. Now leave the diskpart with exit command. Go to the EFI partition and add the EFI bootstrap.
cd /d b:\EFI\Microsoft\Boot\
ren BCD BCD.bak
bcdboot C:\Windows /l en-us /s B: /f ALL
bootrec (boot recover) will fix the UEFI bootloader.
bcdboot will be used to recreate BCD store. The C:\Windows is path where Windows is installed and B: is drive of my EFI partition. The “/f ALL” parameter updates the BIOS settings including UEFI firmware/NVRAM while /l en-us is to localize for US locale (US English).
Add More Partitions
I need more partitions so I create them. I use gdisk for this.