| Author: | Keith Henrickson (guest: search) |
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| Date: | Wed, Feb 21st, 2007 @ 21:46 ( . ) |
Ok, I get most of the theory, but some of the best schemes actually seem to use NO sync marks. If I understand the drive mechanics right, when the head is stepped to a track, it has a 1 in 8 chance of lining up on the data, thus, sync marks are included on a normal disk to say, "Forget what you were doing...HERE'S the real data." So, if the track has no sync, and you're looking for a series of 4 or 5 bytes line PirateSlayer, don't you have a 1 in 8 chance of booting? I seem to recall that GEOS 1.0 used a syncless track and actually wrote it's key 8 times, with a single bit stuffed between each group. Is that what the others do, or is there yet another way to convince a 1541 to reframe? |
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