View Full Version : gparted - configuring clean SSD drive for new OS installation, UEFI

February 16th, 2015, 03:53 AM

I have just finished my first PC build. I was thinking about dual-boot ubuntu and win7, however I am not sure if I know exactly how I should partition my drives.

My motherboard supports UEFI system. So using USBLive "try ubuntu" I formatted both drives and then setted partitioning table to GPT for each drive as it is depicted here http://ubuntuforums.org/showthread.php?t=1958383.
And now, for ubuntu I have partioned the following:

/dev/sda1 efi 20MiB
/dev/sda2 ext4 / 200GiB
/dev/sda3 ext4 /home 200GiB
/dev/sda4 swap 20GiB

I am completely lost when it comes to configuring drive for Windows7 . Someone knows how to tackle this? I have searched the web and I have no clue.

Thank you

February 16th, 2015, 04:11 PM
For Ubuntu with a separate /home or data partition(s), a / (root) of 25GB would be generous. I use about 11GB of my 25GB partition.

Microsoft suggested partitions including reserved partition for gpt & UEFI:
Order on drive is important: msftres

You need to convert Windows 7 to flash drive an do a few updates to make it install in UEFI mode. Default installs seem to be BIOS otherwise. Have not done it but found many posts discussing it.

Prepare an usb thumb drive, to boot windows 7 in UEFI mode
Convert Windows USB flash install to UEFI boot

Change the booting style of Windows Vista or 7 x86_64 versions from BIOS-MBR mode to UEFI-GPT mode without formatting or reinstalling

February 21st, 2015, 02:39 PM
thanks for your reply.

Actually I resolved it this way:

I followed the steps during ubuntu installation and created the following partitions on my SSD drive:

1st efi partition,
2nd ext4 ~100GB for ubutnu,
3rd swap space(for ubuntu),
4th unallocated space ~100GB (for Windows)

After doing this I rebooted PC and inserted Windows CD. Turned out that it's enough setup to go for Windows. So I assume that it just needs efi partition and some unallocated space to successfully install win7.

February 21st, 2015, 06:53 PM
I hope you used more than 20MiB for the size of the EFI partition. I usually use a generous 300MiB, for my actual dual boot use of 55MiB.