Cheers. Okay so far.

I've had this 'volumes locked' problem ever since 5.8.3 (I'm on Mojave on MP2013). Main problem was that it was interfering with the sync with my syn...

Great. Particularly as I just picked up a NOS Thunderbay off the 'Bay.

Cheers, that's good to know.

I just had a grey screen of death Kernel Extensions in backtrace: com.apple.iokit.IOStorageFamily(2.1)[71BB22B0-3075-35A1-B04E-FBAC574DA8...

Okay, so now I've several RAID 5 volumes in enclosures CC'd to several other RAID 5 volumes in other enclosures. Would I be better off doing 1+0, and ...

Okay, I chose 'recover failed disks' and it seems to be okay now.

Okay, hopefully last question. The RAID that I validated twice, then removed I/O and error counters is still showing degraded/ failed but each single...

Okay, found the I/O counter bit. Does this actually do anything to the data/ drives - as in, do I need to clone the 'cleared' RAID again please?

Did you clear the IO counters? My guess if you expected the validate to clear the counters. They are independent. Validate resets all parity bits and ...

Another message. I re-validated the bigger RAID, which took 7 hours. On restarting SR still reports errors. The volume seems to be working okay though...

Okay, something else. LOL. So I decided to forget about validating one volume with dispensible data and wanted to wipe the drives and start again....

And the first RAID I validated also comes up with I/O errors when I plug it back it now. Even though both RAIDs were validated without errors. Odd. I'...

Odd. Second RAID validated successfully. I rebooted and it's still showing I/O errors and I'm having to validate again.