Part 9 - Dual Boot Windows7 v1.1.pdf - Inne - piotrbard

Part 9

Dual Boot Windows 7

Adding Windows 7 on the same HDD as your OS X and Cham install.

Back in August 2009 I put together a dual boot guide for OS X 10.5.7 and Windows 7 on the same HDD

using a method posted by Arial on the voodooprojects’ forum. This worked and allowed Chameleon to

boot either OS X or Windows 7 but the problem had always been that we changed the active partition

away from Windows which caused it to not sleep. For reference my original dual boot guide was at

http://www.insanelymac.com/forum/index.php?showtopic=178292

However, there has since been a development in Chameleon’s stage 0 boot loader ‘boot0’ which now

allows us to leave Windows7 the active partition and therefore adding a dual boot to your install is easy.

Pre Installation checks

As always, make sure you have a backup of your files incase anything goes wrong.

Before doing anything make sure you have the BootCD from this guide or a Bootable USB stick (I show

how to create one at http://www.insanelymac.com/forum/index.php?s=&showtopic=180954&view=findpost&p=1397905 )

and test you can boot in to your Snow Leopard install from which ever one you choose.

These instructions assume you have followed this install guide exactly and partitioned your HDD as

described in ‘Part 1’ and have a spare FAT formatted partition (the FAT partition was originally an

option in my instructions so I will amend that to emphasise it’s usefulness). If you haven’t got a FAT

formatted partition then you will need to go in to Disk Utility and sort yourself one out.

Note: petrs99 has pointed out that Windows 7 won’t install on a partition number higher than 4.

You will also need the latest version of Chameleon which will have the new boot0hfs file and the new

fdisk440. You can find a pre-release version of RC5 in my Support Files which you can get from my thread.

If you have more than one HDD then you must disconnect them all apart from the intended target

HDD in SATA port 0. If you don't disconnect other drives then the Windows7 installer has been known

to write the boot files it needs to a different volume.

The installation

Insert your Windows7 DVD, reboot and boot from it. Then from the Windows7 installer select Custom

(advanced) for a new install, then format the target FAT partition to NTFS before it allows the install.

It should be obvious which partition is the one you want and you can use the size of the partition as an

identifer but make sure you have identified the correct partition or you will destroy your current OS X

installation. After completion, when you reboot Windows7 will have written it's code to the MBR of

the disk and will become the default OS and always boot.

Snow Leopard on the Gigabyte GA-EP45-DS3L by blackosx - Part 9 ‘Dual Boot Windows 7’ Re-write v1.1 - 22nd February 2010

Bring Snow Leopard back

To get OS X back, you need to boot by using either the BootCD or the bootable USB stick (which you

tested with earlier) in to Chameleon and selecting your already existing OS X installation.

Once booted in to your OS X installation, you will then need to re-install Chameleon by following the

steps shown on page 2 of ‘Part 3 - Install Chameleon’ PDF, but with one difference.

When you get to the section:

Drag file fdisk440 from the Support Files to the Terminal & without pressing return type

-f boot0 -u -y /dev/rdisk X

Use this instead:

-f boot0hfs -u -y /dev/rdisk X

That’s the only difference to the install steps and it writes boot0hfs to the first 440bytes of the MBR

which will look for boot1h on a non-active partition. This allows you to leave Windows7 on the active

partition which it require to enter sleep.

When you reboot you should boot straight in to Chameleon and have the option of booting either OS

X or Windows 7.

Snow Leopard on the Gigabyte GA-EP45-DS3L by blackosx - Part 9 ‘Dual Boot Windows 7’ Re-write v1.1 - 22nd February 2010

Version History

v1.1

• Added reference to Windows7 not installing to a partition higher than number 4.

• Added note for using the Latest Chameleon files with boot0hfs and fdisk440.

• Changed first heading.

• Added screenshots of the Windows installation.

Snow Leopard on the Gigabyte GA-EP45-DS3L by blackosx - Part 9 ‘Dual Boot Windows 7’ Re-write v1.1 - 22nd February 2010

Part 9 - Dual Boot Windows7 v1.1.pdf

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