25 Dec
2002
25 Dec
'02
3:01 p.m.
--- Sellam Ismail <foo(a)siconic.com> wrote:
On Wed, 18 Dec 2002 pete(a)dunnington.u-net.com wrote:
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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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?)