unfail the failed drives to return them to the spare pool:
system node run localhost
priv set advanced
disk unfail -s <disk_name>
Repeat above steps for all disks that have failed
Reassign the disks to the storage node
Check disks are added as spares
aggr status -s
All disks should show as spares
disk zero spares
The bad labels will clear once the disk zero is complete.
When disks are added to the storage system with an unsupported Data ONTAP version, the disks fail with bad label errors. The disks are tagged as Bad Label in the broken disks pool and are unable to be used.
Upgrade Data ONTAP to the minimum requirement as indicated in the Disk Drive and Firmware Matrix table in the NetApp Support site.