by gfc » Thu Mar 12, 2020 5:02 pm 
			
			I've just upgraded from Mojave and 1.8.1 to Catalina (10.15.3) and 1.9.4.  It didn't go to plan.
I exported my one and only pool, upgraded the OS and then installed 1.9.4 over the top of 1.8.1.  Upon reboot my pool not import.  I can manually import it but when I do I now see this:
config:
    NAME                                                                                    STATE     READ WRITE CKSUM
    zxstore                                                                                 ONLINE       0     0     0
      raidz1-0                                                                              ONLINE       0     0     0
        media-B09D7708-9584-244F-BCE5-7217CA8538DE                                          ONLINE       0     0     0
        PCI0@0-RP05@1C,4-UPSB@0-DSB1@1-UPS0@0-pci-bridge@2-pci1b21,612@0-PRT0@0-PMP@0-@0:1  ONLINE       0     0     0
        media-01C67746-9DD8-1449-A769-7E49841F9A90                                          ONLINE       0     0     0
        PCI0@0-RP05@1C,4-UPSB@0-DSB1@1-UPS0@0-pci-bridge@0-pci1b21,612@0-PRT0@0-PMP@0-@0:1  ONLINE       0     0     0
errors: No known data errors
Where before I saw this:
config:
    NAME                                            STATE     READ WRITE CKSUM
    zxstore                                         ONLINE       0     0     0
      raidz1-0                                      ONLINE       0     0     0
        media-B09D7708-9584-244F-BCE5-7217CA8538DE  ONLINE       0     0     0
        media-F1584040-448F-9C4B-8470-7B04DFD1A15C  ONLINE       0     0     0
        media-01C67746-9DD8-1449-A769-7E49841F9A90  ONLINE       0     0     0
        media-309C48EB-3A7F-5B49-AA3C-3CD63D9A1F22  ONLINE       0     0     0
errors: No known data errors
I subsequently tried to uninstall/reinstall but the results are the same; no import on boot and the pool reported in this way when imported manually.  To be clear, there were no other changes between export and upgrade.
Any assistance would be appreciated.