Master NetApp ONTAP.
Solve it. Study it. Ship it.
Practical, command-level knowledge for NetApp ONTAP — written for administrators, support engineers, and NCDA candidates. How it works, what to run, and what to do when it breaks.
NCDA Study Area
ONTAP fundamentals, storage networking, data protection, storage efficiency, HA/QoS/security — plus an interactive practice-question set with explanations.
Troubleshooting Guides
Real problems, real commands: volume space exhaustion, performance analysis, broken SnapMirror, NFS mount failures. Each guide walks symptom → diagnosis → fix.
Reference
An organized ONTAP CLI cheat sheet (the commands you actually type) and a network/port reference for firewalls and connectivity checks.
Tools
Aggregate sizing calculator (RAID-DP/TEC geometry, WAFL overhead, snapshot reserve, efficiency) and an IOPS/throughput converter with a SnapMirror catch-up estimator.
Inside the site
NCDA study path
- ONTAP fundamentals — clusters, SVMs, aggregates, volumes, WAFL, snapshots
- Storage networking — NFS, SMB, S3, FC/FCoE/iSCSI, NVMe/FC and NVMe/TCP, LIFs
- Data protection — snapshots, SnapMirror, SnapVault, SM-BC, MetroCluster, NDMP
- Storage efficiency — thin provisioning, dedupe, compression, compaction, FlexClone
- HA, QoS & security — takeover/giveback, storage QoS, encryption, RBAC, monitoring
- Practice questions — interactive NCDA-style questions with detailed answers
Troubleshooting guides
- Volume space exhaustion — "volume is full" and space accounting
- Performance analysis — finding the bottleneck with sysstat, statistics, and QoS counters
- SnapMirror problems — lag, failed transfers, broken relationships
- NFS mount failures — export policies, networking, sec flavors, NFSv4 domain
Reference & tools
- ONTAP CLI cheat sheet — cluster, storage, volumes, protocols, data protection, QoS, security
- Network & port reference — every protocol and port you need for firewalls
- ONTAP upgrade runbook — pre-checks, rolling upgrade, rollback
- Aggregate sizing calculator
- IOPS / throughput converter + SnapMirror catch-up estimator
man <command> and the official documentation.