So, after doing a minor system upgrade (Mac OS 10.13.4) this morning, the disk array on my Pegasus2 R4 has gone missing.
When the Pegasus has started up, Finder says 'The disk you inserted was not readable by this computer'. Promise Utlitity can see the physical drives, but says there are no configured disk arrays in the subsystem. All the physical drives are green in Utility, but have changed configuration to PassThru.
Any ideas?