I'm posting this here in behalf of Troy who created it over in Tech Academy, but does not have permission to post new Topics here as yet.
He wishes to receive review and critique.
How To Install Two Operating Systems
“Dual Boot” – The Hidden Way!
- A computer with at least two hard drives (one allocated for the second operating system)
- An operating system already installed on one hard drive (eg. Windows)
- A second operating system install disc, ready to install on a second formatted hard drive (eg. Ubuntu)
The reason I did this in the first place was because my installation of Ubuntu went wrong somehow, and the GRUB decided not to allow me to access my Windows installation. So, after having a botched Ubuntu installation, and not being allowed access to Windows, I had quite some fun setting up an old rig to find out what it was I needed to do. (I eventually fixed it with Super GRUB Disk - but that's another story). I didn't do this because I have things to hide! It just worked out that way.
First off, I am going to use my setup as the example here, but it can quite easily be substituted with other operating systems. I have Windows Vista as my main operating system. Vista is installed on a 250GB Seagate hard drive. When I press the power button on my tower, the computer loads Vista. Nice and simple...
Next I decided to use an old 80GB Western Digital hard drive I had for the Ubuntu 7.10 installation. This also has some bonus points:
- If one operating system gets botched, or one hard drive fails, you still have a bootable computer
- You still have access to the entire hard drive – it's not split up into partitions.
Before installing the second operating system, power the system off and take necessary anti-static precautions. You'll want to take the case side off and remove the data and power cables from the hard drive with Windows (or your first operating system) on it. This way it's not plugged in at all, and therefore it won't be registered by your BIOS.
At this stage, you should have only the second hard drive connected. As it's formatted, when you start your computer, you should receive an error that there is no bootable device. This is your computer simply telling you that it can't find an operating system to load. Insert your operating system installation disc (eg. Ubuntu) into the drive and reboot. As the Ubuntu CD is also a Live CD, you should see it load. Then you'll need to install it, selecting to use the whole drive at the partition options page. Once it has done installing, it will want to eject the installation disc and reboot. If you let it reboot, it should load the newly installed Ubuntu for you.
Then you will need to power down the system, and take necessary anti-static precautions, and reconnect the power and data cables to your first hard drive. Then, enter the BIOS and ensure that the first hard drive is first in the Boot Device Menu. Then that's it! Your computer is configured to load the first operating system (Windows) by default, and you won't have to deal with GRUB at all.
But of course, now how do you access the second operating system (Ubuntu)?
Quite simply, the trick is to use a feature that I've yet to come across a motherboard that doesn't have it... This is the “Boot Menu” option. By simply tapping F12 (on my Gigabyte motherboard) during the POST screen, my computer comes to a screen where I am to select the bootable device for that session. Other manufacturer's may have a different button to select - I remember an old ASUS motherboard I had was F8 (which made it awfully difficult to select the Safe Mode menu for XP!). You should find it written on the POST page, or consult the user manual.
Selecting the second hard drive should see GRUB boot up, and load Ubuntu! And there you have it, your second operating system – only available if you explicitly select it to load. Not only that, but because linux formats the hard drives differently from Windows, you won't see your second hard drive from within Windows either! Now talk about hidden!