NDMP KBs

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NDMP KBs

Featured

Prepare for NDMP configuration
Verify that the planned configuration is supported

NDMP Authentication Resolution Guide
Solutions to common issues with NDMP Authentication

ndmpcopy in ONTAP
Learn how to run ndmpcopy in ONTAP 9

Unable to discover tape drives or libraries
Troubleshooting workflow when unable to discover tape drives or libraries

NDMP and SVM-DR
Backing up an SVM-DR destination SVM with NDMP

Enable NDMP debug logging
How to enable NDMP debug logging

Other Resources

Why Volume used size in ONTAP is Lower than NDMP Backup Estimate sizeFri, 06 Mar 2026
Windows Server Backup job fails with event id 546 when writing backup data to NetApp SMB shareFri, 06 Mar 2026
What is the status of Flexvol volume after SMTape engine recovery?Fri, 06 Mar 2026
Which FC switch zoning configuration should be used when adding a tape library?Fri, 06 Mar 2026
Which tool to use for copy or move the data of qtree from a volume to a new volumeFri, 06 Mar 2026
The HP tape library keeps on disconnecting from the Controller SAS AdapterFri, 06 Mar 2026
Veeam failed to create snapshots for volume : (401) UnauthorizedFri, 06 Mar 2026
Snapmirror Failed to get owners for Snapshot copy base and incremental snapshotFri, 06 Mar 2026
Specific SVM is not detected by Dell NetWorkerFri, 06 Mar 2026
SVM migration fails with Apply failed for Object: ndmpRestartableBackup_rdb_uiFri, 06 Mar 2026
Slow NDMP backup speeds with certain volumesFri, 06 Mar 2026
Slow NDMP Backups – Throughput Degraded Due to Network Latency and Packet LossFri, 06 Mar 2026
SMTape backup job failing on same drive "Error Description: Aborted in tape layer"Fri, 06 Mar 2026
NetBackup failed via NDMP: Error ndmpagent ndmp_data_v3 failedFri, 06 Mar 2026
New InterCluster LIFs intended for NDMP breaking peering operationsFri, 06 Mar 2026
ONTAP Data Protection tape backup errors after controller upgradeFri, 06 Mar 2026
NDMP tape backups fail with the error "Message from Write Dirnet: Interrupted system call."Fri, 06 Mar 2026
Veeam DMA connection times out. NDMP error:NDMP_TIMEOUT_ERRFri, 06 Mar 2026
NDMP restore fails with message NDMP Service Log: RESTORE: RESTORE IS ABORTED on DMAFri, 06 Mar 2026
NDMP Phase I is slow for large directory full backupFri, 06 Mar 2026

How to run ndmpcopy in ONTAPFri, 06 Mar 2026
NDMP backup performance Resolution GuideFri, 06 Mar 2026
NDMP Dump Backup Using Tree WalkFri, 06 Mar 2026
Ndmpcopy transfer fails with volume is not localFri, 06 Mar 2026
Qtree level NDMP backup job for flexgroup failing with image inconsistencyFri, 06 Mar 2026
Slow NDMP backup, restore, or ndmpcopy performance with insufficient TCP packet window size for NDMPFri, 06 Mar 2026
Veeam failed to create snapshots for volume : (401) UnauthorizedFri, 06 Mar 2026
What is the LIF Choice order for Cluster Aware backups in NDMP?Fri, 06 Mar 2026
When to restart the NDMPD service in Data ONTAP?Fri, 06 Mar 2026
How to enable NDMP debug logging when node-scope mode is enabledFri, 06 Mar 2026
Why Volume used size in ONTAP is Lower than NDMP Backup Estimate sizeFri, 06 Mar 2026
Windows Server Backup job fails with event id 546 when writing backup data to NetApp SMB shareFri, 06 Mar 2026
AUTO-ARCHIVED: Very slow ndmp-restore from tape over fc-portsFri, 06 Mar 2026
What are the best practices for tape reservations?Fri, 06 Mar 2026
What are the common root causes and solutions of NDMP file history backpressure?Fri, 06 Mar 2026
What are the different topologies of an NDMP protocol and what do they mean?Fri, 06 Mar 2026
What is NDMP file history and how is it communicated?Fri, 06 Mar 2026
What is NDMP file history back pressure and what impact does it have?Fri, 06 Mar 2026
Which ports are used for NDMP?Fri, 06 Mar 2026
Which tool to use for copy or move the data of qtree from a volume to a new volumeFri, 06 Mar 2026