The backupDir argument specifies the destination directory for backup operations specified using the backup or backupJournal command, or the source directory for restore operations specified using the restore, restoreFile, restoreJournal, or restorePartitionFile command.
For restore operations, you must specify an existing directory that is valid on the server. For backup operations, the directory is created if it is not present.
This argument must be specified if the jdbutlib command line contains the backup, backupJournal, restore, restoreFile, restoreJournal, or restorePartitionFile command.