--- Sellam Ismail <foo_at_siconic.com> wrote:
> On Wed, 18 Dec 2002 pete_at_dunnington.u-net.com wrote:
>
> > I think the Commodore PET uses modified CUTS. It records each block
> > twice, which is why it's relatively slow, but also pretty robust.
>
> If it records each block twice, and one block is bad, which of the two do
> you trust?
>
> (Or is there a checksum involved too?)
It compares both blocks, byte by byte, and if they do not match, it trusts
neither one. You get a read error.
It's not like the Space Shuttle main computers that vote, and the majority
win (and the dissenters are ignored from that point on).
-ethan
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Received on Wed Dec 25 2002 - 15:01:00 GMT