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  • Re: /boot partition size

    From Lennart Sorensen@21:1/5 to Andika Triwidada on Mon Apr 7 15:20:01 2025
    On Mon, Apr 07, 2025 at 06:08:22PM +0700, Andika Triwidada wrote:
    Not sure if this is the correct list to ask that question.
    But anyway, you need space for at least three sets of unpacked kernel images including generated initrd. For current x86 kernels, one set is roughly 75 MB.
    So 250 MB should be safe for /boot size. But you need to ensure only 2
    latest
    kernels left, for instance, by executing 'sudo apt autoremove --purge' after installing the latest kernel and reboot. That way, you will have needed
    space for
    next kernel installation if needed.

    Looking at my system, I am seeing initrd sizes of 130MB. Add in another
    10MB for the kernel, and you can not fit two kermels in 250MB. Try 500MB
    if you want to be sure to be able to fit two or three kernels at a time
    for a while yet. Of course better yet is not having a separate /boot
    if you don't actually have a specific need for one.

    --
    Len Sorensen

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  • From Cyril Brulebois@21:1/5 to All on Mon Apr 7 15:30:02 2025
    Lennart Sorensen <[email protected]> (2025-04-07):
    Looking at my system, I am seeing initrd sizes of 130MB. Add in another
    10MB for the kernel, and you can not fit two kermels in 250MB. Try 500MB
    if you want to be sure to be able to fit two or three kernels at a time
    for a while yet. Of course better yet is not having a separate /boot
    if you don't actually have a specific need for one.

    Indeed, I wouldn't advise anything below 500M. It's worth keeping in
    mind `apt-get auto{remove,purge}` will keep 2 linux-image-* by default,
    so unless you get rid of the older one manually, that means you need to
    fit 3 kernels (and associated initramfses) at least in a transitory
    fashion (until the next auto{remove,purge} call happens).


    Cheers,
    --
    Cyril Brulebois ([email protected]) <https://debamax.com/>
    D-I release manager -- Release team member -- Freelance Consultant

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  • From Pascal Hambourg@21:1/5 to Jen K on Mon Apr 7 20:10:03 2025
    On 07/04/2025 at 09:23, Jen K wrote:
    I've been reading the official Debian install document, and I can't find an answer when it comes to partitioning how big the /boot should actually be.

    FWIW the /boot size has been raised to 768-1024 MB in Debian installer
    guided partitioning. Same with the EFI partition in provision for systemd-boot/BLS.

    While there are recommendations for /var, /tmp, /root and /home

    They are outdated.
    C.5.1. has a recommendation for /boot but it is outdated too.

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