Debilitatingly slow performance / Mediasonic Probox + Seagate IronWolf
I purchased a Mediasonic ProBox HF2-SU3S2 4 Bay USB 3.0 enclosure, 4 Seagate IronWolf 6TB drives, and SoftRaid in July of 2019. I edited on it just fine until about a year ago, when speeds started to drop. At first I thought it was my iMac performance and replaced that, only to discover that the problems persisted. Now I've discovered it's definitely my RAID. Halp!
Look in SoftRAID disk tiles and see if you are connected at USB3 or USB2. If you are connected at USB3, then you may need to do a backup/restore, this could be the volume directory is damaged.
Drives are indeed showing a USB3 bus connection. What is your recommended procedure for backup/restore?