Well I went back to P16 on my cards , no more warning in FreeNAS.
Thanks BN. I understand going back will stop the error message, but it doesn't answer the question of whether the system is stable or not- it just stops the message.
I am hoping that the FreeNAS team will weigh in on what the best practices are for this situation. I have a setup with 3-3TB WD RED and 3-2TB WD RED in a RAID5 with the SAS9211-8i that I want to use for live data but I dont want to risk it if this error is going to compromise data.
Thank you for replying
PS- does anyone else think if an issue is marked "solved" that a summary of the solution could appear at the top? Just a thought.