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OceanStor 9000 V300R006C00 File System Feature Guide 12

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Troubleshooting

Troubleshooting

This section describes the faults that you may encounter when using Network Data Management Protocol (NDMP) backup and introduces the methods to handle the faults.

An NDMP Backup Task Fails to Be Performed

This failure causes data backup failures between the primary storage and secondary storage.

Symptom

An NDMP backup failure message is displayed, as shown in Figure 13-16.
Figure 13-16  Failed to perform NDMP backup

Possible Causes

  • Possible cause 1: Protected directories do not support direct backup.
  • Possible cause 2: File system snapshots fail to be created.
  • Possible cause 3: File system snapshots fail to be deleted.
  • Possible cause 4: Other causes (For example, NetBackup stops the backup task, the file system fails to be accessed, or the tape library fails to be accessed.)

Fault Diagnosis

Figure 13-17  Troubleshooting flowchart

Procedure

  1. Check whether the network communication is normal.
    1. Check whether the network communication is normal.

      • If yes, go to 2.
      • If no, go to 1.b.

    2. Re-connect cables and check whether you can perform an NDMP backup task.

      • If yes, the failure is removed.
      • If no, go to 2.

  2. Check whether the tape library is normal.
    1. Ensure that the tape drive is working correctly. After that, check whether you can perform an NDMP backup task.

      • If yes, no further operations are required.
      • If no, go to 2.b.

    2. Ensure that the tape library is working properly. After that, check whether you can perform an NDMP backup task.

      • If yes, no further operations are required.
      • If no, go to 3.

  3. Ensure that the backup path is correct. After that, check whether you can perform an NDMP backup task.

    • If yes, no further operations are required.
    • If no, contact technical support.

An NDMP Recovery Task Fails to Be Performed

This failure causes backup data unable to be recovered and compromises data reliability.

Symptom

The administrator fails to perform an DNMP recovery task, as shown in Figure 13-18.
Figure 13-18  Failed to perform NDMP recovery

Possible Causes

  • Possible cause 1: Protected directories cannot be used as recovery directories.
  • Possible cause 2: Other causes (For example, NetBackup stops the backup task, the file system fails to be accessed, or the tape library fails to be accessed.)

Fault Diagnosis

Figure 13-19  Troubleshooting flowchart

Procedure

  1. Check whether any protected directory is used as the recovery directory.
    1. Check whether any protected directory is used as the recovery directory.

      The NDMP backup feature has limiting effects on recovery directories. For details, see the NDMP Feature Guide.

      • If yes, go to 1.b.
      • If no, go to 2.

    2. Change a recovery directory and check whether you can perform an NDMP recovery task.

      • If yes, no further operations are required.
      • If no, go to 2.

  2. Check whether the network communication is normal.
    1. Check whether the network communication is normal between the storage system and the tape library.

      • If yes, go to 3.
      • If no, go to 2.b.

    2. Re-connect cables and check whether you can perform an NDMP recovery task.

      • If yes, no further operations are required.
      • If no, go to 3.

  3. Check whether the tape library is normal.
    1. Ensure that the tape drive is working correctly. After that, check whether you can perform an NDMP recovery task.

      • If yes, no further operations are required.
      • If no, go to 3.b.

    2. Ensure that the tape library is intact. After that, check whether you can perform an NDMP recovery task.

      • If yes, no further operations are required.
      • If no, contact technical support.

Related Information

None.

NDMP Client Authenticates Failed

The NDMP client fails to initiate an authentication request after connecting to the NDMP host.

Symptom

The NDMP client fails to initiate an authentication request after connecting to the NDMP host, as shown in Figure 13-20.
Figure 13-20  Failed to initiate an authentication request

Possible Causes

  • Possible cause 1: The user name or password is incorrect.
  • Possible cause 2: The NDMP client's authentication IP address is locked.

Fault Diagnosis

Figure 13-21  Troubleshooting flowchart

Procedure

  • Possible cause 1: The user name or password is incorrect.
    1. Check whether you have entered the correct user name and password.

    2. Enter the correct user name and password. After that, check whether you can initiate an authentication request.

  • Possible cause 2: The NDMP client's authentication IP address is locked.
    1. Check whether the NDMP client's authentication IP address is locked.

      • If yes, go to 2.
      • If no, contact technical support.

    2. Wait until the IP address is unlocked. After that, check whether you can initiate an authentication request.

      • If yes, no further operations are required.
      • If no, contact technical support.

A Backup Server Fails to Be Connected to an NDMP Server

The backup server (the NDMP client) fails to connect to the NDMP server (the OceanStor 9000).

Symptom

The backup server fails to connect to the NDMP server and the message shown in Figure 13-22 is displayed.

Figure 13-22  Troubleshooting flowchart

Possible Causes

  • Possible cause 1: The NDMP service is not running correctly.
  • Possible cause 2: The designated port is disabled.
  • Possible cause 3: The NDMP server's DNS is not added to the backup server.
  • Possible cause 4: The user name or password is incorrect.

Fault Diagnosis

Figure 13-23  Troubleshooting flowchart

Procedure

  • Possible cause 1: The NDMP service is not running correctly.
    1. Log in to DeviceManager. Health Status under Basic Information is not Normal.
    2. Choose Settings > Storage Settings > File Storage Service > NDMP Settings.
    3. Check whether the Enable check box is selected.

      If it is not selected, select it and click Save. If it is selected, refer to other possible causes.

  • Possible cause 2: The designated port is disabled.
    1. On the backup server, run the telnet command to check whether you can access the designated port.

      For example, if port 10000 is designated, run the telnet xx.xx.xx.xx 10000 command. (Choose Settings > Storage Settings > File Storage Service > NDMP Settings and set the Monitoring Port value to a required value to designate a port.)

      • If Connected to is displayed, the port can be accessed. Go to Possible cause 3.

      • If Connected to is not displayed, go to 2.

    2. Log in to DeviceManager. Health Status under Basic Information is not Normal.
    3. Choose Settings > Storage Settings > File Storage Service > NDMP Settings.
    4. Deselect Enable and click Save.
    5. Reselect Enable. In Monitoring Port, enter the designated port's ID and click Save.

      Check whether the function works correctly.

  • Possible cause 3: The NDMP server's DNS is not added to the backup server.

    Check whether the NDMP server's DNS is added to the /etc/resolv.conf file of the backup server. If the DNS is not added, add it manually. The configuration item is nameserver DNSIP, where nameserver is a dynamic domain name and DNSIP is the cluster's DNS IP address. In DeviceManager, you can choose Settings > Cluster Settings > InfoEqualizer > Network Settings to view the DNS IP address. After you complete the configuration, check whether you can access the dynamic domain name of OceanStor 9000 by executing the nslookup dynamicname command, where dynamicname is the dynamic domain name of OceanStor 9000.

    • If yes, no further operations are required.
    • If no, contact technical support.

  • Possible cause 4: The user name or password is incorrect.

    On the page shown in Figure 13-22, re-enter your user name and password to check whether the connection can be established.

    • If yes, no further operations are required.
    • If no, contact technical support.

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Updated: 2019-06-27

Document ID: EDOC1000122519

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