Performing a differential backup on a Windows ReFS (Resilient File System) can result in data loss.

Performing a differential backup on a Windows ReFS (Resilient File System) can result in data loss.

Article: 100000484
Last Published: 2019-05-06
Ratings: 0 1
Product(s): NetBackup

Severity

Data Loss

 

Description

Under a specific set of circumstances, it is possible that a differential backup performed on an ReFS file system may not recognize that any files have changed, resulting in an empty backup.

What is Affected: This issue affects all currently supported versions of NetBackup, including NetBackup 8.0.

How to determine if Affected: This issue may be experienced when ALL of the following conditions are met:
  • The following attributes are enabled on the Policy:
    • Backup selections include ReFS (Resilient File System) path(s)
    • Use Change Journal
    • Multistreaming
    • Accelerator
  • Messages similar to the following (including a path to a snapshot link) may appear in the File List of the Job Details for affected policies:
    BACKUP E:\testdata1\ USING \\?\GLOBALROOT\Device\HarddiskDmVolumes\DataDG1\SnapV593EFDD402E7\testdata1\ OPTIONS:ALT_PATH_PREFIX=C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_7728_1,​FITYPE=MIRROR,MNTPOINT=E:\,​ FSTYPE=ReFS

Action Required

If this issue is experienced in NetBackup 7.7.3 or 8.0, please contact Veritas technical support, referencing this document and Etrack number below for Emergency Engineering Binary (EEB) availability.

EEB for 7.7.3: 3918718
EEB for 8.0:    3918719

This issue is addressed in NetBackup 8.1 and later versions.

 

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