Hello, I am trying to test some disk i/o speeds and I am stumbled on two questions: 1. Does it matter if I set in BIOS Legacy or AHCI for the drive, regarding the read/write performance? 2. Can you suggest a sane disk I/O benchmark, writing from RAM to disk (i.e. cp /dev/null ....)?
I am on snapshots for amd64 and I think i have a really slow writing to disk on OpenBSD only. Thank you.

