Cron <root at lock> cd /var; dump 0f - . | (cd /altvar; restore -rf - )

[Cron Daemon]

  DUMP: Dumping sub files/directories from /var
  DUMP: Dumping file/directory .
  DUMP: Date of this level 0 dump: Tue May 25 01:55:03 2021
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/rwd0e (/var) to standard output
restore: cannot open /dev/tty: Device not configured
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 207818 tape blocks.
  DUMP: Volume 1 started at: Tue May 25 01:55:04 2021
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: 204887 tape blocks
  DUMP: Date of this level 0 dump: Tue May 25 01:55:03 2021
  DUMP: Volume 1 completed at: Tue May 25 01:55:28 2021
  DUMP: Volume 1 took 0:00:24
  DUMP: Volume 1 transfer rate: 8536 KB/s
  DUMP: Date this dump completed:  Tue May 25 01:55:28 2021
  DUMP: Average transfer rate: 8536 KB/s
  DUMP: DUMP IS DONE