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Determining the amount of backup data

Before you enter the dump command, it is helpful to estimate the amount of backup data so that you can determine the number of tape files and the number of tapes required for the backup.

Step

  1. For each item that you want to back up, enter the following command:
    df path_name

    path_name is the name of the path.

    Note: For multiple items, such as multiple volumes, add the data for each item to determine the total amount of data to be backed up.