Resolving silent data corruption on NetBackup Appliances

  • Article ID:100042674
  • Last Published:
  • Product(s):Appliances


A VxFS issue may cause silent data corruption on NetBackup appliances with the following software versions:

  • 2.7.1
  • 2.7.2
  • 2.7.3
  • 3.0

This article contains the following EEBs:

  • SYMC_NBAPP_EEB_ET3941404-
  • SYMC_NBAPP_EEB_ET3941403-
  • SYMC_NBAPP_EEB_ET3941402-
  • NBAPP_EEB_ET3936093-

These EEBs fix the following issue:

Using the writev() call with a VxFS filesystem results in null data being written to the file, which can cause silent data corruption.

Error Message

No error messages appear when silent data corruption occurs.


This is a known VxFS issue. For more information, refer to the following article:


The attached EEBs resolve this issue for all of the above listed software versions. To resolve this issue, the Veritas Storage Foundation team has published a hotfix that is included in these EEBs. The hotfix is applied when you complete the EEB installation.

Note: This issue is fixed in appliance software versions 3.1 and later.

You must reboot the appliance after the EEB installation has completed (see step 8).

Install the EEB as follows:

  1. Log in to the NetBackup Appliance Shell Menu.
  2. Go to the Manage > Software view and run the following command:
    Share Open
  3. On the host where you downloaded the EEB, mount the following share location: /inst/patch/incoming
  4. Copy the EEB to the mounted share location.
  5. Return to the appliance shell menu, go to the Manage > Software view, then run the following command: Share Close
  6. Run the following command to verify that the EEB was downloaded to the appliance:
    Manage > Software > List Downloaded
  7. Run the following command to install the downloaded EEB file (the version 3.0 EEB file name is used as an example):
    Install NBAPP_EEB_ET3936093-                                                   
  8. Reboot the appliance after the EEB installation has completed.




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