| 1. | If the volume contains a valid media header , performs the following checks
如果卷中包含有效的媒体标头，将执行以下检查： |
| 2. | Specifies that all backup sets should be overwritten , but preserves the media header
指定应覆盖所有备份集，但是保留媒体标头。 |
| 3. | The media set password is saved when the media header is written ; it cannot be changed
当写入媒体标头时，将保存媒体集密码；不能更改该密码。 |
| 4. | If these checks pass , overwrites any backup sets on the media , preserving only the media header
如果这些检查都通过了，则覆盖该媒体上的所有备份集，只保留媒体标头。 |
| 5. | If the media is empty , generates a media header using the specified medianame , mediapassword , and mediadescription , if any
如果卷中不含有效的媒体标头，则会发生错误。 |
| 6. | If medianame was specified , verifies that the given media name matches the media header s media name
如果指定了medianame ，则验证给定的媒体名称是否匹配媒体标头的媒体名称。 |
| 7. | Format causes the backup operation to write a new media header on all media volumes used for the backup operation
禁用备份集的过期和名称检查，这些检查一般由backup语句执行以防覆盖备份集。 |
| 8. | The only time that backup will not verify the media password is when it formats the media , which overwrites the media header
Backup不验证媒体密码的唯一情况是格式化媒体时，这将覆盖媒体标头。 |
| 9. | If the tape media is empty or the disk backup file does not exist , all these interactions write a media header and proceed
如果磁带媒体为空或磁盘备份文件不存在，则所有这些交互将写入媒体标头并继续进行。 |
| 10. | If backup writes the media header , backup will assign the media set password to the value specified in the mediapassword option
如果backup写入媒体标头， backup将给mediapassword选项中指定的值分配媒体集密码。 |
