How to find details about zpool import failure?

[dastisnas]

I have raidz2 pool with 8 disks.
2 disks seems toast, 6 are listed as online and yet pool import failing with I/O errors

Is there a way to see what exactly causing import failure?

Code:

[roks@data /]$ sudo zpool  import
Password:
   pool: spool
     id: 15400694087576136940
  state: FAULTED
 status: One or more devices are missing from the system.
 action: The pool cannot be imported. Attach the missing
    devices and try again.
    The pool may be active on another system, but can be imported using
    the '-f' flag.
   see: http://illumos.org/msg/ZFS-8000-3C
 config:

    spool                                        FAULTED  corrupted data
      raidz2-0                                      DEGRADED
        da14                                        ONLINE
        16925054514777691563                        UNAVAIL  cannot open
        6751164381418150458                         UNAVAIL  cannot open
        da17                                        ONLINE
        gptid/dd82afb5-4a86-11ea-be41-f46d0425b290  ONLINE
        gptid/200786fb-e9cc-11e7-96a2-f46d0425b290  ONLINE
        gptid/67b22c4d-ec48-11e7-aea1-f46d0425b290  ONLINE
        da15                                        ONLINE

Thanks!

 

[dastisnas]

The error itself

Code:

sudo zpool  import  -f spool
Password:
cannot import 'spool': I/O error
    Destroy and re-create the pool from
    a backup source.

 

[dastisnas]

zdb can read "label" from all 6 disks marked as ONLINE...

zdb -lu /dev/daxx