CONTAP-795463: ONTAP Select upgrade to 9.19.1 and above fails with no root volume found
Issue
During ONTAP 9.19.1x upgrade for ONTAP Select, the upgraded system enters into a boot loop reporting no root volume found. The console log reports RAID Label write errors followed by diskHasWrongInfo errors.
The disk ownership information from maintenance mode will report as 'Not owned':
PANIC: No root volume found. in SK process rc on release 9.19.1P2 (C) on Tue Sep 15 18:28:16 GMT 2026
Sep 15 18:28:16 [ots-cluster-01:raid.label.io.writeError:notice]: Label write on Disk /aggr0_ots_cluster_01/plex2/rg0/0d.9 S/N [0VW000YUEcXHEzhK4NB2] UID [0VW000YUEcXHEzhK4NB2] failed with storage error Label read after label write did not match.. The system will stop using the disk for I/O operations.
Sep 15 18:58:44 [ots-cluster-01:diskown.diskHasWrongInfo:error]: Disk 0b.10 (S/N 0VW000/sTdkJtXv6ndZ5) has ownership information for disk 02084000:09787A9C:14E62EC6:CE990500:00000000:00000000:00000000:00000000:00000000:00000000 (S/N ?) on it.
Sep 15 18:58:44 [ots-cluster-01:diskown.diskHasWrongInfo:error]: Disk 0b.10 (S/N 0VW000/sTdkJtXv6ndZ5) has ownership information for disk 02084000:09787A9C:14E62EC6:CE990500:00000000:00000000:00000000:00000000:00000000:00000000 (S/N ?) on it.
The disk ownership information from maintenance mode will report as 'Not owned':
*> disk show -v
Local System ID: 2467434567
DISK OWNER POOL SERIAL NUMBER HOME DR HOME CHKSUM
--------- ------------- ----- ------------- ------------- ------------- --------
0b.10 Not Owned NONE 0VW000/sTdkJtXv6ndZ5 Zoned
0b.9 Not Owned NONE 0VW000/s7g8RNWEfI9R4 Zoned
0b.8 Not Owned NONE 0VW000/s6houaEqLx9B3 Zoned
0b.7 Not Owned NONE 0VW000/sX2E6SsN-yd02 Zoned