When writing to a DVD at 1X, the data is transferred at a speed of approximately 1.32 MB/s (1,385,000 bytes per second). So 16 speed is about 21.20 MB/s. A normal IDE port can handle 33MB/s.
For Blu-ray disks, 1x speed is defined as 36 megabits per second (Mbit/s), which is equal to 4.5 megabytes per second (MB/s). However, as the minimum required data transfer rate for Blu-ray movie disks is 54 Mbit/s, the minimum reading speed for a Blu-ray drive intended for commercial movie playback should be 2X.