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About thl

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  1. thl

    Speeding up DVD read speed

    Hi, I wonder how the reading speed of a DVD can be increased, in general. This is not strictly an ImgBurn question but it is related. I have a BD reader, model MATSHITA BD-CMB UJ160B 1.60 in a Toshiba laptop with Windows 10. For DVD's, the max reading speed is 8x (11080 kB/s) by specification. The reading speed of a DVD by ImgBurn is around 3000 kB/s or DVD 1.3x. Using a custom application I am working on, I get a similar reading speed. However, with the most missed predecessor of ImgBurn, the drive rapidly becomes very noisy and the read rate is around 8300 kB/s or 6x. How is it possible to speed up the drive this way? In my application, I have to transfer big files as fast as possible from DVD to disk. I tried various DeviceIoControl using either IOCTL_CDROM_SET_SPEED (set speed or set streaming) and the equivalent MMC commands using IOCTL_SCSI_PASS_THROUGH and could never speed up the drive. Using low speed values, I was able to slow it down but I could never increase to speed higher than the default speed (the same as I observe with ImgBurn as well). So, is this a huge industrial secret? How did ImgBurn's predecessor to speed up the drive? Thanks for your help.

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