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Detect Blu-ray optical disc drive speed?
Posted: Tue Mar 06, 2018 10:14 am
by beandog
So, Blu-ray drives have different read speeds. Spec says a 1x can read at 32 Mbits / second, or, 4.5 megabytes.
Is there a way though to detect the read-speed of an optical drive in Linux that anyone knows of?
Re: Detect Blu-ray optical disc drive speed?
Posted: Wed Mar 28, 2018 4:47 am
by beandog
Okay, I figured it out.
Put a Blu-ray disc in your tray (not DVD or CD, they will report different speeds), and run cdrdao:
Here's a snippet from mine:
Code: Select all
Maximum read speed: 17982 kB/s (CD 102x, DVD 12x, BD 4x)
Current read speed: 17982 kB/s (CD 102x, DVD 12x, BD 4x)
Maximum write speed: 0 kB/s (CD 0x, DVD 0x, BD 0x)
Current write speed: 0 kB/s (CD 0x, DVD 0x, BD 0x)
Mine's an older drive, so it's only 4x reading speed.
Blu-ray spec is 4.5 MB/s (1024k notation), so mine is reading at 18 MB/s total.
Note that cdrdao uses 1000 notation for kilos, which is why the number is lower. See
http://www.matisse.net/bitcalc/