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> > >FYI, Windows XP creates MBR in the first sector even on a removable
> > >2KB/sec MO disk and it seems to use physical block numbers.
> > I haven't found an official spec for MBR on non-512byte blocks, but
> > so far everyone seems to use the first 512 bytes from LBA 0.
> That is my suspicion - which probably means most of the boot code doesn't
> know about the actual sector size!
I wonder if there was other possible scenario..
Anyway, if BIOS (or firmware) uses bytes (or other different units
from one for LBA in MBR) for I/O strategy, we have to know sectorsize.
> Netbsd's fdisk could be changed to do 8k reads (as I changed installboot).
> But that might cause a problem is there are insufficient unused sectors
> before the first partition (or next partition for the extended partition
fdisk(8) should know hardware sector size anyway.
Otherwize it can't calculate LBA in the sector size
from partition size in MB or GB.
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