Node stuck in boot loop during ONTAP upgrade and failed to detect disks
Color Definition

Applies to
- ONTAP 9
- MCC-FC
- FAS/AFF systems
Issue
- During an ONTAP upgrade on FC MetroCluster one node enters a boot loop and cannot detect any disks.
[Node-02:mcc.config.bootConfigNotRead:ALERT]: Configuration could not be read from persistent storage due to internal error Failed to retrieve persistent storage (MBX) due to no mailbox disks being found. The system will try to retrieve or set the configuration automatically later, during boot.
Select option 4 from the boot menu to choose disks for the root volume and spare core space.
Target Adapters found:
8 Fibre Channel Target Adapters found!
0 iSCSI Target Adapters found!
WARNING: there do not appear to be any disks attached to the system.
No root volume found.
- BIOS image resetting to load defaults.
BIOS Version: 18.15
Portions Copyright (C) 2014-2025 NetApp, Inc. All Rights Reserved.
Initializing System Memory ...
BIOS Version: 18.9
Portions Copyright (C) 2014-2023 NetApp, Inc. All Rights Reserved.
Initializing System Memory ...
Loading Device Drivers ...
BIOS image changed, resetting to load defaults.
- Initiator ports found configured as Target port.
*> ucadmin show
Current Current Pending Pending Admin
Adapter Mode Type Mode Type Status
1a fc target - - offline
1b fc target - - offline
1c fc target - - offline
1d fc target - - offline
