Iāll take look. Iāve already ordered hardware. I much newer Dell R540 is on its way.
Itās got multiple issues.
1782229245 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 39 metadata errors and 896 data errors
Iāll move it into the new enclosure once it is here and take another run at it.
Best I can deduce at this point is a failing back plane on one of the 4 bay cages in it. At one point I can see it dropping another physical device out. That would put it beyond the limit of the RAID Z2 config.
Given what I see in the logs it may still be possible to recover it, but it will take someone with far more knowledge than I do about ZFS. It would be useless to continue trouble shooting or trying in the current enclosure.
1782227628 spa_misc.c:419:spa_load_note(): spa_load($import, config trusted): LOADING
1782227628 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/092e1995-6e43-11f1-881a-00074317efd0': vdev_geom_open: failed to open [error=2]
1782227628 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/c6e19795-7228-11ef-ba7f-00074317efd0': best uberblock found for spa $import. txg 27882043
1782227628 spa_misc.c:419:spa_load_note(): spa_load($import, config untrusted): using uberblock with txg=27882043
1782227628 spa_misc.c:404:spa_load_failed(): spa_load($import, config untrusted): FAILED: couldn't get 'config' value in MOS directory [error=5]
1782227628 spa_misc.c:419:spa_load_note(): spa_load($import, config untrusted): UNLOADING
1782227639 spa.c:6252:spa_tryimport(): spa_tryimport: importing Spinners, max_txg=27881836
1782227639 spa_misc.c:419:spa_load_note(): spa_load($import, config trusted): LOADING
1782227639 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/092e1995-6e43-11f1-881a-00074317efd0': vdev_geom_open: failed to open [error=2]
1782227639 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa $import. txg 27857560
1782227639 spa_misc.c:419:spa_load_note(): spa_load($import, config untrusted): using uberblock with txg=27857560
1782227639 vdev.c:166:vdev_dbgmsg(): replacing-4 vdev (guid 15442831169735986313): vdev_copy_path: vdev type mismatch: replacing != disk
1782227639 spa_misc.c:419:spa_load_note(): spa_load($import, config untrusted): provided vdev tree:
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: root, guid: 15449366848463911438, path: N/A, degraded
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: raidz, guid: 3044575188808327488, path: N/A, degraded
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: disk, guid: 12608461263144079861, path: /dev/gptid/c6e19795-7228-11ef-ba7f-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 1: disk, guid: 8494155210588754851, path: /dev/gptid/04e69d29-7330-11ef-a9f6-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 2: disk, guid: 8477440304910353809, path: /dev/gptid/5d9b589e-72a0-11ef-a36b-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 3: disk, guid: 305253118871903556, path: /dev/gptid/2c0b1b10-72e7-11ef-917c-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 4: replacing, guid: 15442831169735986313, path: N/A, degraded
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: disk, guid: 8675270927048567072, path: /dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 1: disk, guid: 10304588760689494607, path: /dev/gptid/092e1995-6e43-11f1-881a-00074317efd0, can't open
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 5: disk, guid: 7922966623353351330, path: /dev/gptid/87f22765-7360-11ef-88e2-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 6: disk, guid: 9190466072889394239, path: /dev/gptid/06e7c7f0-7206-11ef-9a1b-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 7: disk, guid: 5433800611810275809, path: /dev/gptid/fee51789-7308-11ef-8146-00074317efd0, healthy
1782227639 spa_misc.c:419:spa_load_note(): spa_load($import, config untrusted): MOS vdev tree:
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: root, guid: 15449366848463911438, path: N/A, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: raidz, guid: 3044575188808327488, path: N/A, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: disk, guid: 12608461263144079861, path: /dev/gptid/c6e19795-7228-11ef-ba7f-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 1: disk, guid: 8494155210588754851, path: /dev/gptid/04e69d29-7330-11ef-a9f6-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 2: disk, guid: 8477440304910353809, path: /dev/gptid/5d9b589e-72a0-11ef-a36b-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 3: disk, guid: 305253118871903556, path: /dev/gptid/2c0b1b10-72e7-11ef-917c-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 4: disk, guid: 8675270927048567072, path: /dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 5: disk, guid: 7922966623353351330, path: /dev/gptid/87f22765-7360-11ef-88e2-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 6: disk, guid: 9190466072889394239, path: /dev/gptid/06e7c7f0-7206-11ef-9a1b-00074317efd0, closed
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 7: disk, guid: 5433800611810275809, path: /dev/gptid/fee51789-7308-11ef-8146-00074317efd0, closed
1782227639 spa_misc.c:419:spa_load_note(): spa_load($import, config untrusted): vdev_copy_path_strict failed, falling back to vdev_copy_path_relaxed
1782227639 spa_misc.c:419:spa_load_note(): spa_load($import, config trusted): final vdev tree:
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: root, guid: 15449366848463911438, path: N/A, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: raidz, guid: 3044575188808327488, path: N/A, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: disk, guid: 12608461263144079861, path: /dev/gptid/c6e19795-7228-11ef-ba7f-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 1: disk, guid: 8494155210588754851, path: /dev/gptid/04e69d29-7330-11ef-a9f6-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 2: disk, guid: 8477440304910353809, path: /dev/gptid/5d9b589e-72a0-11ef-a36b-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 3: disk, guid: 305253118871903556, path: /dev/gptid/2c0b1b10-72e7-11ef-917c-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 4: disk, guid: 8675270927048567072, path: /dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 5: disk, guid: 7922966623353351330, path: /dev/gptid/87f22765-7360-11ef-88e2-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 6: disk, guid: 9190466072889394239, path: /dev/gptid/06e7c7f0-7206-11ef-9a1b-00074317efd0, healthy
1782227639 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 7: disk, guid: 5433800611810275809, path: /dev/gptid/fee51789-7308-11ef-8146-00074317efd0, healthy
1782227640 spa.c:8392:spa_async_request(): spa=$import async request task=2048
1782227640 spa_misc.c:419:spa_load_note(): spa_load($import, config trusted): LOADED
1782227640 spa_misc.c:419:spa_load_note(): spa_load($import, config trusted): UNLOADING
1782227640 spa.c:6113:spa_import(): spa_import: importing Spinners, max_txg=27881836 (RECOVERY MODE)
1782227640 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782227640 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa Spinners. txg 27857560
1782227640 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): using uberblock with txg=27857560
1782227640 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): performing a complete scan of the pool since extreme rewind is on. This may take a very long time.
1782227723 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 1 metadata errors and 1 data errors
1782227723 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config trusted): FAILED: spa_load_verify failed [error=5]
1782227723 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): UNLOADING
1782227723 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_retry: rewind, max txg: 27857559
1782227723 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782227723 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa Spinners. txg 27857559
1782227723 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): using uberblock with txg=27857559
1782227724 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): performing a complete scan of the pool since extreme rewind is on. This may take a very long time.
1782227806 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 1 metadata errors and 1 data errors
1782227806 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config trusted): FAILED: spa_load_verify failed [error=5]
1782227806 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): UNLOADING
1782227806 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_retry: rewind, max txg: 27857558
1782227806 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782227806 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa Spinners. txg 27857558
1782227806 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): using uberblock with txg=27857558
1782227807 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): performing a complete scan of the pool since extreme rewind is on. This may take a very long time.
1782227890 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 1 metadata errors and 1 data errors
1782227890 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config trusted): FAILED: spa_load_verify failed [error=5]
1782227890 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): UNLOADING
1782227890 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_retry: rewind, max txg: 27857557
1782227890 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782227890 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa Spinners. txg 27857557
1782227890 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): using uberblock with txg=27857557
1782227891 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): performing a complete scan of the pool since extreme rewind is on. This may take a very long time.
1782227974 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 1 metadata errors and 1 data errors
1782227974 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config trusted): FAILED: spa_load_verify failed [error=5]
1782227974 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): UNLOADING
1782227974 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_retry: rewind, max txg: 27857556
1782227974 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782227974 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa Spinners. txg 27857556
1782227974 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): using uberblock with txg=27857556
1782227974 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): performing a complete scan of the pool since extreme rewind is on. This may take a very long time.
1782228057 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 1 metadata errors and 1 data errors
1782228057 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config trusted): FAILED: spa_load_verify failed [error=5]
1782228057 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): UNLOADING
1782228057 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_retry: rewind, max txg: 27857555
1782228057 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782228058 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': best uberblock found for spa Spinners. txg 27857555
1782228058 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): using uberblock with txg=27857555
1782228058 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): performing a complete scan of the pool since extreme rewind is on. This may take a very long time.
Then a little later we end up here.
1782229245 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_verify found 39 metadata errors and 896 data errors
1782229245 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config trusted): FAILED: spa_load_verify failed [error=6]
1782229245 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): UNLOADING
1782229245 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): spa_load_retry: rewind, max txg: 27857541
1782229245 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config trusted): LOADING
1782229252 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/2c0b1b10-72e7-11ef-917c-00074317efd0': vdev_geom_open: failed to open [error=2]
1782229252 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0': vdev_geom_open: failed to open [error=2]
1782229252 vdev.c:161:vdev_dbgmsg(): disk vdev '/dev/gptid/5d9b589e-72a0-11ef-a36b-00074317efd0': vdev_geom_open: failed to open [error=2]
1782229252 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): vdev tree has 1 missing top-level vdevs.
1782229252 spa_misc.c:419:spa_load_note(): spa_load(Spinners, config untrusted): current settings allow for maximum 0 missing top-level vdevs at this stage.
1782229252 spa_misc.c:404:spa_load_failed(): spa_load(Spinners, config untrusted): FAILED: unable to open vdev tree [error=2]
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: root, guid: 15449366848463911438, path: N/A, can't open
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: raidz, guid: 3044575188808327488, path: N/A, can't open
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 0: disk, guid: 12608461263144079861, path: /dev/gptid/c6e19795-7228-11ef-ba7f-00074317efd0, healthy
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 1: disk, guid: 8494155210588754851, path: /dev/gptid/04e69d29-7330-11ef-a9f6-00074317efd0, healthy
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 2: disk, guid: 8477440304910353809, path: /dev/gptid/5d9b589e-72a0-11ef-a36b-00074317efd0, can't open
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 3: disk, guid: 305253118871903556, path: /dev/gptid/2c0b1b10-72e7-11ef-917c-00074317efd0, can't open
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 4: disk, guid: 8675270927048567072, path: /dev/gptid/78242ea7-72c2-11ef-a5f8-00074317efd0, can't open
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 5: disk, guid: 7922966623353351330, path: /dev/gptid/87f22765-7360-11ef-88e2-00074317efd0, healthy
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 6: disk, guid: 9190466072889394239, path: /dev/gptid/06e7c7f0-7206-11ef-9a1b-00074317efd0, healthy
1782229252 vdev.c:216:vdev_dbgmsg_print_tree(): vdev 7: disk, guid: 5433800611810275809, path: /dev/gptid/fee51789-7308-11ef-8146-00074317efd0, healthy
3 devices that it canāt talk to are just too much. Those 3 devices are in the same 4 bay cage. Rules out the controller as the other 4 drive array attached to the same controller is in perfect working order. Unfortunately for me thatās a remote replication of a box at the office. Just my luck. If it died it would have had zero impact. 
I do greatly appreciate the guidance and help.