Hello, I've gotten the O_DIRECT error when starting VMs. I have (1) SSD at 232gb and (1) 1tb disk drive. I configured as RAID 0 just to get things going as I will be changing my configuration in the future. I read in the documentation to enable write back to stop the O_DIRECT error. This solves the problem, but when write through is enabled it also stops the error What is the difference between write through and write back?