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Re: blocksizes

> fs_fsbtodb depends on the block size of the underlying medium.

Does it?  All you need to do is make a mental switch from thinking of
fs_fsbtodb as "filesystem blocks to underlying device blocks" to
thinking of it as "filesystem blocks to interchange blocks", where an
"interchange block" is defined as 512 octets.

Given how non-512-byte-sector devices have historically had their
drivers pretend they're 512-byte-sector devices, this is what it
actually is, after all - it's just that the mapping between interchange
blocks and real device blocks has been handled by the device driver
rather than by MI code.

...or...Am I Missing Something (tm)?

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