Partition table before installing Ubuntu in UEFI mode alongside Windows 10

Question

when installing Ubuntu in UEFI mode alongside Windows 10 I don't know what the partition table should look like. After this image:

what options will be presented? Assuming no recovery partition for Windows, just that the whole drive is partitioned for Windows 10 with GPT and UEFI.

The WindowsDualBoot directions specify:

Manual partitioning

    Choose "Manually edit partition table".
    Listed will be your current partitions.
    Select the partition you want to resize and press Enter.
    Select "Size:", press Enter.
    Select Yes, press Enter.
    Type in a new size in gigabytes for your partition, it's recommended you free up at least 10 GB of free space for your Ubuntu install. Press Enter when happy with your changes. It may take some time to apply the changes.

    Create a swap partition of at least your amount of RAM (if you don't know, 8000 MB is a good value).
    Create a partition for your Ubuntu installation.

    Create other partitions if necessary: see DiskSpace
    Select "Finish partitioning and write changes to disk".

before I install what should the disk look like from fdisk or similar? On my system lsblk shows:

thufir@doge:~$ 
thufir@doge:~$ sudo lsblk 
NAME                  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                     8:0    0 74.5G  0 disk 
├─sda1                  8:1    0  487M  0 part /boot
├─sda2                  8:2    0    1K  0 part 
└─sda5                  8:5    0 74.1G  0 part 
  ├─ubuntu--vg-root   252:0    0   72G  0 lvm  /
  └─ubuntu--vg-swap_1 252:1    0    2G  0 lvm  [SWAP]
sr0                    11:0    1 1024M  0 rom  
thufir@doge:~$

but before I press the button to install alongside Windows 10, what should it look like from fdisk or similar? Assuming UEFI and GPT and that Windows 10 is on the first partition.

GPT: https://en.wikipedia.org/wiki/GUID_Partition_Table

and UEFI:

https://help.ubuntu.com/community/UEFI

Pankaj Kumar Gautam · Accepted Answer · 2016-12-12T09:14:00.363

1

You can visit at WindowsDualBoot to find help on dual boot Ubuntu.

The partition table will look like

edited Dec 12 '16 at 09:14

answered Dec 12 '16 at 08:32

Pankaj Kumar Gautam

1,092
11
19

score 1 · Answer 2 · answered Dec 12 '16 at 09:26

Install ubuntu normally on another drive, allow the grub installer to take over the windows one.

After you're done normally you will not see windows being installed, don't worry it's common.

Input the following command once you boot up your ubuntu system.

sudo update-grub

It will now try to list all the installed OS's in your hard disk.

The text should be as follows

Found linux image: /boot/vmlinuz-3.19.0-21-generic
Found initrd image: /boot/initrd.img-3.19.0-21-generic
Found linux image: /boot/vmlinuz-3.19.0-18-generic
Found initrd image: /boot/initrd.img-3.19.0-18-generic
Found linux image: /boot/vmlinuz-3.19.0-16-generic
Found initrd image: /boot/initrd.img-3.19.0-16-generic
Found linux image: /boot/vmlinuz-3.16.0-38-generic
Found initrd image: /boot/initrd.img-3.16.0-38-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
Found Windows 10 (loader) on /dev/sda1
done

Next time you're booting up your PC, you will be able to see windows listed in your grub loader

PS: What I mentioned is best applicable when you choose something else and you install ubuntu on a separate formatted drive without touching the windows drive.

Partition table before installing Ubuntu in UEFI mode alongside Windows 10

2 Answers2