Update firmware were just a temporary fix, I figured out the root cause last week when I heard click noise from the disks.
I used a single cable from power supply to drive 6 enterprise 6TB disks, and apparently that cable wasn't powerful enough to drive all of them.
Changed to a 1000W modular power supply with tons of sata connectors, and connect only up to 4 drives with each cable solved my problem completely. Hopefully if there's anyone else have same issue, this may help you.
