ONTAP Troubleshooting — Every Runbook in One Place
When something breaks, the first ten minutes decide the outcome: capture evidence, rank the likely causes, and test the cheapest fix first. These runbooks follow exactly that pattern — symptom to command to resolution — across networking, protocols, replication, upgrades, and space management.
Network & connectivity troubleshooting
LIFs, routes, ports, MTU, cluster interconnect: ping to packet level.
NFS troubleshooting
Mount failures, performance, permissions, and protocol-level debugging.
NFSv4 ACL troubleshooting
ACL inheritance, ID mapping, and permission denial debugging.
SMB/CIFS troubleshooting
Auth failures, share permissions, slow transfers, browsing issues.
S3 object storage troubleshooting
SigV4 403s, time skew, bucket policies, ghost multipart usage.
SnapMirror troubleshooting
Lag, broken relationships, seeding failures, resync issues.
ONTAP upgrade troubleshooting
ANDU vetoes, paused updates, rollback, mixed-version operation.
MetroCluster troubleshooting
Switchover failures, mediator quorum, forced quorum risk.
Aggregate offline recovery
Bringing aggregates back, degraded vs offlined, reconstruction.
Volume space troubleshooting
Full volumes, snapshot reserves, autodelete, ghost usage.
Performance troubleshooting
Latency hot spots, queue depth, slow clients, saturation.
Backup & restore troubleshooting
SnapVault/NDMP/SnapCenter job failures and restore problems.
Common problems
The frequent-failure quick reference.
Decommission troubleshooting
Safe hardware removal, data migration, cleanup.
Proxmox on ONTAP
NFS/iSCSI with Proxmox VE: setup and troubleshooting.
ONTAP error codes
What ONTAP error codes mean and how to fix them.
Top 20 ONTAP mistakes
The mistakes that cause most outages, and how to avoid them.