3 ms·

Using the rdisk over the disk device for this sort of dd bulk copy has been recommended practice on MacOS X forever.

• azinman2 4y ago
  Does it not go through task priority filters as explained in the article?
  • hoherd 4y ago
    The article answers your question: > a character device (e.g., /dev/rdisk0) ..., however, bypass the buffer cache and spec_strategy entirely. ... This is pretty much exactly what we want