Unassigned disks currently cause the Disk Getter to crash. We have already developed a fix for this problem. At the same time, the check Disk can be used to check for unassigned disks:

$ ./check_netapp_pro.pl Disk ‑H fasdc_cluster ‑‑what=unassigned
NETAPP_PRO DISK WARNING - 192 disks checked, 0 critical and 1 warning
fasdc_cluster 1.13.13: unassigned (WARNING)
fasdc_cluster-01 1.10.0: assigned to fasdc_cluster-01
fasdc_cluster-01 1.10.1: assigned to fasdc_cluster-01
fasdc_cluster-01 1.10.10: assigned to fasdc_cluster-01

(…)

The fix and extension will be available in version 3.1.1.