27 Nov
2008
27 Nov
'08
7:31 p.m.
Exactly what "MFM" or "RLL" means,
however, is more of a problem.
Manufacturers of controllers varied wildly in their implementation of
the encodings, address marks and checksum polynomials. But yeah, MFM
is (1,3) RLL and what we usually refer to as "RLL" is (2,7) RLL, but
there were ARLL controllers using longer runs (3,11)? to get more
capacity.
Would that be something like that Perstor "controller" I ran with for a while?
Got 158M out of a pair of ST251s with that card, until the bearing noise got
to be a bit too much to deal with...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin