> Hmm, the kernel has to be in the first 2 or 4 GB if I remember
> correctly because old OBPs have such limits but that's not really a
> filesystem limit.

1GB.  That limit comes about because the bootrom versions in question
always use only 6-byte CDBs, never 10-byte, and as a result have only
21 bits of block number.  This means they are not capable of accessing
other than the first 2097152 sectors.

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