Erasing a tape physically deletes all backups stored on the tape and removes the information about these backups from the database. However the information about the tape itself remains in the database.
After erasing, a tape located in the Unrecognized tapes or Imported tapes pool is moved to the Free tapes pool. A tape located in any other pool is not moved.
You can apply the operation to one tape at a time.
To erase a tape:
Details. You cannot cancel the erasing operation.