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Thread: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

  1. #11
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    Ubuntu's default install is just / (root). But on newer drives that are a lot larger than years ago when that design was set, it makes for a very large / in most cases.

    Better to have separate /home and/or data partition(s). If sharing data with Windows, you will need a shared NTFS data partition, but you create that in advance or after Ubuntu install leaving space for the NTFS partition. If most of your data is in your data partitions, you do not need separate /home, but may want a slightly larger / (root) as some data may get stored there. I have all data in separate data partitions and only use 7GB in new install & my older 18.04 grew to just over 12GB even with good housecleaning.

    Ubuntu now creates a 2GB swap file, so do not create a swap partition. Although some with server type installs still suggest a slight larger 4GB swap partition.

    Code:
    fred@focal-z97:~$ df -hT -x squashfs -x tmpfs -x devtmpfs
    Filesystem     Type  Size  Used Avail Use% Mounted on
    /dev/sda3      ext4   24G  7.2G   16G  32% /
    /dev/sda1      vfat  499M   16M  484M   4% /boot/efi
    /dev/sdb4      ext4  385G  110G  256G  31% /mnt/data
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  2. #12
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    Thanks - understanding gradually improving here! So "create [partition] after Ubuntu install" - does this mean that as long as I've made space first by shrinking "C", I can leave out the GParted step, and achieve the extra partition(s) during the installation? That would be one less risk.

    I've previously chickened out of that stage during installations, having shrunk "C" drive to make space, I've let Ubuntu find its own answer, trusting its decision more than my own.
    If I get it wrong, I suppose a re-install second attempt is possible ?? Irreversible steps are quite intimidating when taken in fog, albeit not complete dark now!

    I'm also unaware how to assign partitions so that they are recognised as data partitions, rather than the place the OS installs itself.

  3. #13
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    I do not like letting an installer automaticallly change partitions, so I only use Something Else.
    With Something Else you have two options, one is just selecting a partition that you have previously created or want to reuse and telling installer it is / (root) and ext4. If separate /home you select /home & ext4. And if a reinstall you must NOT select the format box, or all your data in /home is erased. But you have good backups, so a mistake is never the end of the world.

    I use gparted to partition in advance & then Something Else to choose.

    Second option is to create / & optional system partitions during install.
    The installer is similar to gparted in creating partitions, if you have not created them in advance.

    See howto's at bottom:
    https://gparted.org/documentation.php

    How to Install Ubuntu 18.04 Alongside With Windows - screenshots Something Else
    https://www.tecmint.com/install-ubun...-with-windows/
    How To Install Ubuntu Linux Alongside Windows 10 (UEFI)
    http://www.everydaylinuxuser.com/201...alongside.html
    Last edited by oldfred; 2 Weeks Ago at 09:50 PM.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  4. #14
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    That's truly helpful, much appreciated. Today's otherwise busy, will report back as soon as I get time to follow up. With so many "how to" pages, some of which are better than others, it's good to know which are reliable.

  5. #15
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    With apologies for yet more questions...

    Quote Originally Posted by oldfred View Post
    Second option is to create / & optional system partitions during install.
    The installer is similar to gparted in creating partitions, if you have not created them in advance.
    Is it fair to say, given that I'm finding GParted info somewhat daunting, working with the Install "Something Else" section will be enough, even though you'd personally prefer GParted?

    The UEFI Boot section would be good if I came to it with more understanding, I think. The quick scan I've had time for so far on the rest quickly goes out of my depth.

    How to Install Ubuntu 18.04 Alongside With Windows - screenshots Something Else
    https://www.tecmint.com/install-ubun...-with-windows/
    That looks truly helpful. So if I basically slavishly follow steps from around the patch on Something Else, where the screenshot time moves to 09.12, that should work for me, I hope. Am I right that labelling a section as " EXT4 journaling file system" is enough for the computer to work it as data storage, or is there another step needed for this to work?
    I see at https://help.ubuntu.com/community/Li...stemsExplained the paragraph at the bottom, "Different file systems on the same disk" gives a dire warning, but I guess I'm not contravening that, am I?

    Sadly this one:
    How To Install Ubuntu Linux Alongside Windows 10 (UEFI)
    http://www.everydaylinuxuser.com/201...alongside.html
    got me a "file not found" response.

    There's https://fossbytes.com/install-ubuntu...-10-dual-boot/ if that's deemed OK.

    One more for now, please - I downloaded Ubuntu 20LTS using this current laptop, and used the "Startup Disk" tool to make my bootable USB drive. Various "HowTo" sites advise Rufus as essential, but is there any reason why Startup Disk won't have done the job equally well? I've used it on earlier updates.

    Thanks as always. I feel a whole lot nearer readiness for actually starting!

  6. #16
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    Time to retire that old link.
    I probably should check the links I post as many now are older, but differences between Windows 8 and 10 and all the Linux flavors are minimal, mostly graphics have changed somewhat.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  7. #17
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    Life is too short to check all links every time, especially when dealing with cartloads of questions from people like me

    Any comment on my other queries in #15. please?

  8. #18
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    We find many users who have an issue with the installer.

    Sometimes it is the flash drive, sometimes the downloaded ISO, sometimes just the port on the system used and sometimes the tool used to create the live installer. And in most cases we never know what issue really was.

    So whatever works is good.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  9. #19
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    One more, before I take the plunge.

    I still find the info on partitions & what each is used for, confusing, I'm sorry. So my concern is that if I set the partitions wrong it may impede what I can do with the machine.

    * Please would you point at any serious flaws in my proposed route? I'm sure there would be more optimal possibilities, but if this will work satisfactorily I think I can set it up.

    Step 1: use Windows Disk Manager to shrink C partition from 930GB to 140GB, leaving me 790GB to play with. Assuming I'm correct that "C" is where Windows continues to reside, I hope that should leave it plenty of headroom.
    Step 2: use USB flash drive, hoping this works, to install.
    Step 2: During "Something Else" stage of install, assign 30GB for Ubuntu to reside in, which I think is / (root), and the remaining c.760GB as /home. Each of these to be chosen as EXT4 option.

    * Ubuntu now creates its own Swap directory, you said, OldFred - should I assign something smaller than 760 as /home to leave space for this?

    Given my original received advice from a sound/video engineer, that to work with video or sound recording, I'd need 8GB RAM and 500 GB available hard disk, I'm hoping this will do the job.

    ... or have I completely misunderstood? It's sadly possible!

    With thanks and good wishes.

  10. #20
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    Re: Installing Ubuntu 20LTS dual boot with Windows: Speed, partition sizes

    That will work.

    I like to have multiple installs and separate partitions for some things. Back with XP 10 years ago I also had a Shared NTFS data partition so I could use XP & Ubuntu with some of the same data.
    But If later you want more partition(s), you can just shrink /home. Too many partitions starts to lead to size management issues, so always a trade off.

    Do you have good backups, always most important step.

    And be sure to boot install media in same boot mode as Windows. UEFI or BIOS.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

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