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Tech Head - The Technology Section
The Work Bench and Soldering Station
On the scrounge again..
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<blockquote data-quote="Vipersan" data-source="post: 1007597" data-attributes="member: 325666"><p>..but with a writer ...the requirement is both read and to write..</p><p>And therein lies the problem..</p><p>Not enough info available ...and constant changes being applied all the time to the physical formats..</p><p>Tis both interesting /fascinating ...and frustrating..</p><p></p><p>When you think about it ..</p><p>even if you used a red laser for both CD and DVD ..you would have to have greater control over focus (firmware of the servo system) ..to pinpoint and read DVD data as it more compact on the disc surface ...plus there may well be a need for greater spin speed of that disc ...</p><p>In theory an ageing disc motor or faulty servo system could prevent a DVD read ..but still allow CD read..</p></blockquote><p></p>
[QUOTE="Vipersan, post: 1007597, member: 325666"] ..but with a writer ...the requirement is both read and to write.. And therein lies the problem.. Not enough info available ...and constant changes being applied all the time to the physical formats.. Tis both interesting /fascinating ...and frustrating.. When you think about it .. even if you used a red laser for both CD and DVD ..you would have to have greater control over focus (firmware of the servo system) ..to pinpoint and read DVD data as it more compact on the disc surface ...plus there may well be a need for greater spin speed of that disc ... In theory an ageing disc motor or faulty servo system could prevent a DVD read ..but still allow CD read.. [/QUOTE]
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Tech Head - The Technology Section
The Work Bench and Soldering Station
On the scrounge again..
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