Avamar: How to Restore CIFS Share from NDMP Backup While Preserving Inheritance

Riepilogo: When restoring CIFS data from an Avamar NDMP backup, the original file permissions—including owner, group, and ACLs—are reapplied, overriding Windows inheritance settings. To enforce inheritance during restore, add --ignoreacls to the avtar.cmd file on the restore client. Without this, restored files may not reflect updated parent directory permissions, requiring manual intervention. ...

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Istruzioni

Enable inheritance for CIFS restores using NDMP.

Prerequisites

  • Access to the Avamar client host that performs the restore.
  • Backup Agent service running under a user with Domain Admin privileges.

Procedure

  • Locate the avtar.cmd file for the restore client.
  • If the file does not exist, create it.
  • Add a line containing --ignoreacls on its own line.
  • Save the file and verify that the Backup Agent service is running.

File path

/usr/local/avamar/var/[CLIENT_NAME]/avtar.cmd

 

Example steps

# Replace [CLIENT_NAME] with the actual client name
cd /usr/local/avamar/var/[CLIENT_NAME]

# Create avtar.cmd if it does not exist
if [ ! -f avtar.cmd ]; then
    touch avtar.cmd
fi

# Append the ignoreacls option
echo "--ignoreacls" >> avtar.cmd

# Verify the Backup Agent service runs as Domain Admin
systemctl status avamar-backup-agent

 

Warning: Adding --ignoreacls overrides the ACLs saved in the backup. Ensure this is the wanted behavior before proceeding.
Caution: The Backup Agent service must run under a Domain Admin account; otherwise the restore may fail to apply the new ACL inheritance.

Prodotti interessati

Avamar Plug-in for NDMP
Proprietà dell'articolo
Numero articolo: 000211049
Tipo di articolo: How To
Ultima modifica: 16 ott 2025
Versione:  2
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