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Shine
Registered: Jul 2012
Posts: 328 |
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)? |
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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. |
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soci
Registered: Sep 2003
Posts: 473 |
Sending an "init" will move the head back without the need to open it, usually. |
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chatGPZ
Registered: Dec 2001
Posts: 11119 |
that usually refers to protections that would bump the head (like when you are formatting a disk) - and its mostly just bolloks. |
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Oswald
Registered: Apr 2002
Posts: 5020 |
sometimes the head got stuck in my 1541I, issueing a format command with no disk inserted always fixed it. |
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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 ;-) |
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chatGPZ
Registered: Dec 2001
Posts: 11119 |
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. |
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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 |
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chatGPZ
Registered: Dec 2001
Posts: 11119 |
the regular end is track 40 :) its only a problem if you go higher than that. |
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nomistake
Registered: Apr 2011
Posts: 29 |
LOL dude that's what i wrote im my first reply :-)
"a high track (>41)" |
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chatGPZ
Registered: Dec 2001
Posts: 11119 |
Quote:since track 35 ist the regular end |
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nomistake
Registered: Apr 2011
Posts: 29 |
come on, dude - really??
if you format a disk with open1,8,15,"n:nn,ii":close1 you will have 35 tracks formatted... this is what i mean by "regular".
if 40 was "normal" then it wouldn't make sense for the early developers to put a protection there.
anyway, if you like to keep nit-picking, go ahead - i'm done. |
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soci
Registered: Sep 2003
Posts: 473 |
Quote: 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.
Misaligning the head from software is quite difficult to achieve, at least on later models.
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chatGPZ
Registered: Dec 2001
Posts: 11119 |
thats why i said "its mostly bolloks" :) that fear comes from experience with a handful early US protections used on the first longboard drives.... on later drives its not really an issue. |
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Fungus
Registered: Sep 2002
Posts: 618 |
Yeah only the early "toaster" mechanisms would get stuck past track 38. Power cycling the drive was usually enough to fix it, as the motor would become unresponsive for some reason.
Only experienced that on very early drives like groepaz said. |
