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Forums > C64 Productions > Last Ninja - Protection modifys Disk Drives permanently?
2015-06-13 13:17
Shine

Registered: Jul 2012
Posts: 388
Last Ninja - Protection modifys Disk Drives permanently?

Hello folx!

"Allerdings bekam System 3 Probleme wegen Laufwerksproblemen. Durch den Kopierschutz wurden Diskettenlaufwerke verstellt und machten diese unbrauchbar, wie ein Leser einer britischen C64 Zeitschrift bemerkte."

https://www.c64-wiki.de/index.php/System_3

Is that true that the protection from Last Ninja causes a permanent modification to Disk Drives (Disk Drive damage)?
2015-06-13 13:54
nomistake

Registered: Apr 2011
Posts: 29
afaik some protections move the drive head to a high track (>41) and in some cases this jams the head and you have to open the drive and manually move it back again.
2015-06-13 15:16
soci

Registered: Sep 2003
Posts: 486
Sending an "init" will move the head back without the need to open it, usually.
2015-06-13 15:19
chatGPZ

Registered: Dec 2001
Posts: 11523
that usually refers to protections that would bump the head (like when you are formatting a disk) - and its mostly just bolloks.
2015-06-13 15:40
Oswald

Registered: Apr 2002
Posts: 5127
sometimes the head got stuck in my 1541I, issueing a format command with no disk inserted always fixed it.
2015-06-13 15:46
nomistake

Registered: Apr 2011
Posts: 29
Quote: that usually refers to protections that would bump the head (like when you are formatting a disk) - and its mostly just bolloks.

the difference is: if you format a disk (or init the drive) the head moves to the other direction ( -> track 0 )
and as i wrote "in some cases" doesn't mean it happens all the time on every drive ;-)
2015-06-13 15:59
chatGPZ

Registered: Dec 2001
Posts: 11523
Quote:
the difference is: if you format a disk (or init the drive) the head moves to the other direction

no. the protections that are referred to as "misaligning the drive" are those that bump the head to track 0.
2015-06-13 16:03
nomistake

Registered: Apr 2011
Posts: 29
well i'm not 100% sure but protections like the pirateslayer v1 checked for a pattern on track 37/36 and if that failed the head rushed to track 41 (or further if possible) and sometimes this was a problem for some drives. i have no idea why they got stuck
...maybe because the head wasn't meant to move that far out - since track 35 ist the regular end
or the drives were dirty... idk
2015-06-13 16:05
chatGPZ

Registered: Dec 2001
Posts: 11523
the regular end is track 40 :) its only a problem if you go higher than that.
2015-06-13 16:07
nomistake

Registered: Apr 2011
Posts: 29
LOL dude that's what i wrote im my first reply :-)
"a high track (>41)"
2015-06-13 16:11
chatGPZ

Registered: Dec 2001
Posts: 11523
Quote:
since track 35 ist the regular end
 
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