spinning rust

Hi everyone, I'm looking for advice on how to get the most performance out of my hardware. I have a Lenovo ST250 with a RAID 530-8i controller (flashing to IT mode is not an option). My disk setup is as follows: 1. 1x Intel 4520 M.2 SATA SSD (480GB) 2. 4x SAS 10K 12Gbps (900GB) 3. 2x SAS...

Hi All, Hoping to gain a better understanding of why I'm seeing a difference in performance running the same fio command in different contexts. A little background, my pool originally consisted contained 4 vdevs, each with 2x 3TB. However due to a failing disk on mirror-3 and wanting to...