The command disk assign all fails when Disk Ownership is blank instead of Unowned

Applies to

Data ONTAP 7 and earlier

Issue

When Disk Ownership is blank instead of Unowned, the  disk assign all -f  command will fail.

*> disk assign all -f
*>
*> disk show -v
Local System ID: 101199912
DISK OWNER POOL SERIAL NUMBER
-------------------------------------------
0b.16 Pool0 V5Y9MZKA
0b.27 Pool0 V5Y9N1ZA
0b.25 Pool0 V5Y9S5PA
0b.28 Pool0 V5Y9N5GA
0b.29 Pool0 V5Y9N0SA
0b.17 Pool0 V5Y9S3XA
0b.23 Pool0 V5Y9MVNA
0b.22 Pool0 V5Y9S25A
0b.24 Pool0 V5Y9N1HA
0b.26 Pool0 V5Y4D1ZA
0b.21 Pool0 V5Y9N0RA
0b.20 Pool0 V5Y9SA4A