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What does the message "...ensure that the destination has sufficient space" mean?

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ndmp
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Applies to

  • ONTAP 9
  • NDMP backup
  • backup log

Answer

  • During review of the backup log for a NDMP backup, a message estimating the storage requirements for restore is found
  • The message mentions space requirements, inode requirements, and to ensure there is sufficient space
  • Example log message:
To restore this filesystem, a total of nnnnnn KB space and nnnnnn number of free inodes is required.For a data copy operation, ensure that the destination has sufficient space to perform the restore.
  • The message is not an error, and can be seen in the backup log for any job reaching this point in the backup process
  • The message is not indicating there is insufficient space to perform the current backup
  • Note that the message begins with "To restore this filesystem"
  • This is an informational message to help provide guidance for future, potential restores
  • The purpose of the message is to help ensure a future restore destination has enough space
Ignore this message unless:
  • Troubleshooting a restore failure that seems to be space-related
  • Examining a past backup log to determine how much space a restore may require

Additional Information

To use the message to help troubleshoot a restore failure that may be due to lack of free space
  • Locate the backup log that contains information about the data being restored
  • The needed log is the backup log of the original backup data being restored
  • If AutoSupport is available, check BACKUP.GZ section around the date of the last known backup
    • Find the To restore this filesystem message associated with the filesystem or volume name being backed up
  • If AutoSupport is not available, check /etc/log for the backup log corresponding to the date of the last backup
    • The backup log will reside on the same node as the volume being backed up
    • Find the To restore this filesystem message associated with the filesystem or volume name being backed up
  • The total amount of space and number of free inodes indicated during backup is the amount of space and free inodes required for restore
  • Ensure the restore destination has greater than or equal to the amount of space and number of free inodes indicated during backup
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