kgallen Posted June 1, 2019 Report Share Posted June 1, 2019 As I seem to be trying to repair a number of (my) MD desks... are any of the Sony test discs e.g. TDYS-1 available anywhere - or even can a standard MD disc be used to make a clone? I realise the test discs are used for amongst other things for bit error rate checking, and thus a "perfect" disc is desirable, rather than a "second generation" disc that would have a non-zero BER purely from the errors inherent in copying to a non-perfect disc in a non-perfect machine. Maybe these discs are a more fundamental digital data pattern that one that would result from ATRAC encoding of audio and thus my cloning idea is pure nonsense... I'm not sure if any of the test discs listed in the various Sony MD Service Manuals will actually help, but being able to conduct a proper "AUTO CHECK" scan appears to be a good idea...! But anyway, any thoughts anyone? Thanks, Kevin Quote Link to comment Share on other sites More sharing options...
sfbp Posted June 1, 2019 Report Share Posted June 1, 2019 You don't need the test disc. Just something filled with data from a known good drive, i think. Even then it's all about the TOC. You can make what you want by cloning. I seem to recall cloning an LP4 disk. Quote Link to comment Share on other sites More sharing options...
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