I moved from having a 2x4TB + 2x4TB ZFS setup to a 6x2TB ZFS using a Dell H200 Controller (flashed to IT mode) and the performance is sluggish. After installing Docker and using Glances, I noticed the alert "CRITICAL on CPU_IOWAIT (38.6)". This keeps coming up very frequently so there is obviously a bottleneck here. The CPU is a 4670K, Ram is 16GB. Is this a controller issue perhaps?
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