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    SubjectRe: Block sizes < 512 bytes
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    > After testing and enjoying the panic that ensued, I did some hunting and
    > discovered in fs/buffer.c that the block size must >= 512 bytes.
    >
    > Why is this? I admit I'm unfamiliar with most of the filesystem code, but
    > it seems a little silly to limit the block size in this (seemingly
    > arbitrary) way.

    Mainly so we have enough bits in a 32bit value to describe a large device.

    > Am I doing this wrong? Is there another way to acheive what I want?

    I think you will need to run the vfs at 512 bytes and do your own work
    reblocking

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