The following example creates a mirrored media set in which each mirror consists of two media families 此示例将创建镜像媒体集，其中每个镜像包含两个媒体簇。然后将
Additionally , that media password must also be supplied to perform any restore operation from the media set 另外，从该媒体集执行任何还原操作时也必须提供媒体密码。
To specify a media set password , use the mediapassword option in the backup or restore statement 若要指定媒体集密码，请在backup或restore语句中使用mediapassword选项。
For a mirrored media set , the backup operation writes to multiple groups of backup devices 当针对每个镜像服务器列出多个设备时，这些设备的顺序将决定每个设备的媒体簇。
The following example creates a mirrored media set containing a single media family and four mirrors and backs up the 此示例将创建包含一个媒体簇和四个镜像的镜像媒体集，并将
Because the recovery model has just been changed , the with format option is specified to create a new media set 由于恢复模式已更改，因此指定了with format选项来创建新的媒体集。
When a password is defined on a media set , the user also must supply the media password to perform these operations 如果为媒体集定义了密码，则用户还必须提供媒体密码才能执行这些操作。
In a striped media set , multiple media families exist . if the striped media set is unmirrored , each device corresponds to a family 执行级联更新时，将更新所有外键值，使其与新的主键值匹配。
This dialog displays the name of the next media set if available , the backup set name , and backup set description 此对话框显示下一个媒体集（如果可用）的名称、备份集的名称以及备份集的说明。
If a password is defined for the media set , the password must be supplied before you can create a backup set on that media set 如果为媒体集定义了密码，则在该媒体集上创建备份集之前必须提供此密码。
