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Druva Documentation

NAS share backup workflow

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This article provides the workflow diagrams and steps for data backup of NAS shares on Windows and Linux. 

Backup workflow

The following workflow illustrates the data flow during backup of NAS shares on Windows or Linux: 

NAS share backup workflow.png

The following table summarizes the workflow steps. 

Step Operation

Step 1

 A backup request is initiated and forwarded to the NAS proxy. 

Step 2


Phoenix checks if the NAS proxy is running. 

  • If the proxy is running, Phoenix performs the backup.
  • If the proxy is down, Phoenix performs the backup based on the type of backup job, as specified below.
    • For a backup now job, Phoenix queues the backup request. Phoenix completes the request after the NAS proxy starts.
    • For a scheduled job, Phoenix skips the backup request.

Step 3


Phoenix determines the type of backup.

If it is the first backup from any source, Phoenix performs a full backup. The subsequent backups are incremental backups.

Step 4

Phoenix agent performs a full scan of the files and folders on the NAS share.

Step 5

NAS proxy sends the scanned files and folders for backup to Phoenix Cloud.


  • If Phoenix is unable to back up  locked files at the first attempt, it checks if the files are unlocked at the end of the backup. If the files are unlocked, they are backed up in the same backup cycle.  Locked files are not backed up.
  • Phoenix supports valid UTF-8 encoded file names, filepaths, and share names. Files with filenames encoded in a format other than UTF-8 are skipped from backups. 
Step 6 Phoenix Cloud applies deduplication and saves incremental data in snapshots.