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    • What are the best practices for tape reservations?
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/What_are_the_best_practices_for_tape_reservations
      Not all application packages are capable of using Persistent Reservations, and not all tape subsystem hardware can handle Persistent Reservations, so NetApp also supports using the older style SCSI re...Not all application packages are capable of using Persistent Reservations, and not all tape subsystem hardware can handle Persistent Reservations, so NetApp also supports using the older style SCSI reserve/release commands. More precisely, the option is in force when a tape drive or medium changer is opened and determines the reservation method used on that device until it is closed.
    • Medium Changer is not visible from the filler anymore
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Medium_Changer_is_not_visible_from_the_filler_anymore
      Applies to ONTAP 9 Tape Media changer Issue The media changer was disconnected from the filler. EMS log: Thu Dec 09 13:07:40 +0100 [<node_name>: isp2400_asyncd_0: mlm.tapemc.lun.removed:notice]: The m...Applies to ONTAP 9 Tape Media changer Issue The media changer was disconnected from the filler. EMS log: Thu Dec 09 13:07:40 +0100 [<node_name>: isp2400_asyncd_0: mlm.tapemc.lun.removed:notice]: The medium changer LUN '<SANswich_name>:<portnumber>.126L0' (S/N: <serial_number>) is no longer visible to this node.
    • Are IBM TS1660 tape drives supported?
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Are_IBM_TS1660_tape_drives_supported
      Customers who need this supportability can open a Support ticket to have the case added to the request. Note: The technical ticket only serves the purpose of adding the request and case ID to the RFE....Customers who need this supportability can open a Support ticket to have the case added to the request. Note: The technical ticket only serves the purpose of adding the request and case ID to the RFE. Customers needing an update on the status of the RFE and/or would like to drive it forward as a matter of urgency, please engage your Account Team or Sales Representative to do so.
    • Troubleshooting NDMP backup aborted
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Troubleshooting_NDMP_backup_aborted
      Applies to ONTAP 9 DATA ONTAP 8 Network Data Management Protocol (NDMP) Data Management Application (DMA)/ Backup Applications Tape Aborted backup operation Description This article describes how to t...Applies to ONTAP 9 DATA ONTAP 8 Network Data Management Protocol (NDMP) Data Management Application (DMA)/ Backup Applications Tape Aborted backup operation Description This article describes how to troubleshoot NDMP backup operations aborted.
    • Troubleshooting NDMP backup to tape reservation conflict
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Troubleshooting_NDMP_backup_to_tape_reservation_conflict
      Applies to Network Data Management Protocol (NDMP) Tape NDMP Backup to tape fails randomly An error reported on Backup.GZ for the resource: dmp Wed Jun 10 14:57:30 CEST 202 /<vserver>/CIFS/Users(1) Lo...Applies to Network Data Management Protocol (NDMP) Tape NDMP Backup to tape fails randomly An error reported on Backup.GZ for the resource: dmp Wed Jun 10 14:57:30 CEST 202 /<vserver>/CIFS/Users(1) Log_msg (DIRNET send work, failed to add to the queue, error=3. Tape reservation conflict reports on EMS-LOG-FILE.GZ: Wed Jun 10 14:57:30 CEST [<node>: slifc_intrd: tape.cmd.scsiErrNullSense:error]: Tape device <node>:15.126 reports reservation conflict status on command opcode 0xa.
    • NDMP backups issued by Commvault run via network instead of FC
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/NDMP_backups_issued_by_Commvault_run_via_network_instead_of_FC
      Applies to ONTAP 9 CommVault NDMP Issue Tape library is connected to NetApp cluster NDMP backups issued are running over the network to backup host (CommVault Media Agent) instead of directly to tape
    • Troubleshooting NDMP backup aborted due to Tape errors
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Troubleshooting_NDMP_backup_aborted_due_to_Tape_errors
      Applies to ONTAP 9 DATA ONTAP 8 Network Data Management Protocol (NDMP) Tape Description This article describes how to troubleshoot NDMP backup operations aborted due to Tape errors.
    • Very poor performance during backup to LTO8 tape
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Very_poor_performance_during_backup_to_LTO8_tape
      Applies to ONTAP 9 NDMP Disk performance issue Tape backup Issue NDMP backups to LTO8 tape are not running at the expected speed Expected ~3TB/h, seeing ~800GB/h
    • ONTAP Multi-path support for NDMP tape backups
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/ONTAP_Multi-path_support_for_NDMP_tape_backups
      ONTAP allows the support of multiple paths to tapes, media changers, and bridge router devices that support multiple ports or are part of a “fabric”. A maximum of two paths can be configured from the ...ONTAP allows the support of multiple paths to tapes, media changers, and bridge router devices that support multiple ports or are part of a “fabric”. A maximum of two paths can be configured from the storage system (ONTAP's cluster-wide) to access the same tape drive in a tape library The use of (SCSI/persistent) reservations should be limited to management through the filer instead of pass-thru reservation control through 3rd Party tools.
    • Tape drives reported as not responding on Commvault due to reservation conflict
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Tape_drives_reported_as_not_responding_on_Commvault_due_to_reservation_conflict
      Applies to ONTAP 9 Commvault Network Data Management Protocol (NDMP) Tape Issue DMA does not release the SCSI reservations on the tape drives EMS log: Fri Jul 23 00:47:59 +0100 [<node_name>: isp2400_i...Applies to ONTAP 9 Commvault Network Data Management Protocol (NDMP) Tape Issue DMA does not release the SCSI reservations on the tape drives EMS log: Fri Jul 23 00:47:59 +0100 [<node_name>: isp2400_intrd: tapemc.device.resvConfl:error]: Reservation conflict on tape device <tape_name>.
    • NDMP backup with Netbackup is failing with media write error 84
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/NDMP_backup_with_Netbackup_is_failing_with_media_write_error_84
      NDMP backup jobs are failing on the backup application with status: 84: media write error even after the NDMP logs shows backup completed successfully Jun 4, 2021 7:32:47 PM - Error bptm (pid=2792) wr...NDMP backup jobs are failing on the backup application with status: 84: media write error even after the NDMP logs shows backup completed successfully Jun 4, 2021 7:32:47 PM - Error bptm (pid=2792) write error on media id 000609, drive index 0, writing header block, 0 Jun 4, 2021 7:32:47 PM - Error ndmpagent (pid=16777) Client_Name: BACKUP: Error: job aborted Jun 4, 2021 7:32:47 PM - Error ndmpagent (pid=16777) Client_Name: BACKUP: Error: BACKUP_NET IS ABORTED