can't import pool after Reset configuration to defaults

Dear friends
Just finish with a NAS
FreeNAS-11.2-U6
MB X10SL7-F
Processor:
Intel(R) Xeon(R) CPU E3-1241 v3 @ 3.50GHz (8 cores)
Memory:
32 GiB

With 6x3Tb WD Red in one zpool raidz2 (Import vdev & making pool under GUI) & 2 Boot WD Green SSD in mirror
Boot SSD connected to the direct MB SATA
All Pool's HDD connected to the L-SAS SATA

Add 2 more HDD to L-SAS SATA -> get a problem with LAN. can't reach NAS via GUI
Desided to reset configuration to defaults via CLI
Restored...

can't import pool after Reset configuration to defaults