- edited description
cd/dvd speed error check
Issue #25
new
The ability to test a dvd drives laser and read speed and bit error rate it is hard to find a good working drive these days and a way to test them would be handy.
Comments (3)
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reporter
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repo owner
Hum, I'd have to check a bit of documentation on how ATAPI protocol works. My biggest fear is that ATAPI drives do not report read error per se but rather notify of a timed out request that needs to be interpreted as a DRE. So you don't know how many times the laser had to retry reading the same sector to get you the requested data; you just either get it or get thrown an error if the retry count reaches a certain threshold. Still I think it could be possible to do a basic test with a DVD-R burned with a predefined dummy iso image.
Testing speed could prove difficult as DMA isn't enabled in Cromwell. I don't think PIO speeds could reach 16X DVD speeds. Maybe 4X or 8X at most.
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reporter
A simple test to show how long it takes to get to a specific % say 25,50,75 100 through the disk and give a average score as it will be relative if there is significant errors it would slow the progress of reading but I guess dma may need to be implemented or it may flood the interface?.
a specific iso would make results comparable but it depends on the media and as the xbox is picky maybe a specific title /game may be a better idea 007 or mech assault are quite common games in the modding community?
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