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No Space left, format drive for better allocation?

  • Ive already run into a size issue on the Onion after installing phython3 lite. Is there a way to increase the root size other than getting an SD card? Can I reduce tmpfs ?

    Filesystem Size Used Available Use% Mounted on
    /dev/root 5.5M 5.5M 0 100% /rom
    tmpfs 29.7M 212.0K 29.5M 1% /tmp
    /dev/mtdblock6 9.1M 8.9M 148.0K 98% /overlay
    overlayfs:/overlay 9.1M 8.9M 148.0K 98% /
    tmpfs 512.0K 0 512.0K 0% /dev

  • The problem is the overlay scheme - when you make changes, you don't actually replace the existing files in the same storage blocks, rather you use additional blocks to store the updated files, with the overlay system then hiding the original versions as they continue to take up space.

    The only real fixes are to

    • not replace as many existing files
    • put the versions you need in the read only partition; technically this can be done by skilled use of uImage and squashfs tools without the rebuild from source that would normally be used to generate a custom disk image (over a year in, building from source still doesn't yield a system with working wifi), but it would be a fairly tricky process to figure out
    • use some other storage media, though beware that SD cards tolerate unprepared power cycling and even usage for Linux type filesystems relatively poorly.

    Changing the size of the tmpfs partitions won't help, as those are ramdisks, and only really use memory to the extent that they are utilized, which the 1% and 0% numbers indicate they are not.

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