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Old 22 December 2013, 17:13   #33
mark_k
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Quote:
Originally Posted by IFW View Post
Doesn't it use track as 0-159 +? (ie 0.0: 0, 0.1: 1, 1.0: 2... 79.0; 158, 79.1: 159...)
If yes, then it turns on pre-compensation at track 40.0 with the value 80.
Ah yes you're right. Could more precompensation for the innermost tracks (say 70+) have improved the data retention over time?

I wonder how many disk copier programs (which don't use trackdisk routines) also vary pre-compensation depending on the track number. It could be that some don't, meaning disks written using those programs would become bad quicker than ones written via trackdisk.device.
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