安全和审计日志、备份、启动盘、档案副本、调试信息，以及很少访问的大对象。

Security and audit logs, backups, boot disks, archival copies, debugging information, rarely accessed large objects.

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外部U盘或空白的DVD，用来备份重要文件。

External USB drive or blank DVDs: For backing up important files.

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值得注意的是，临时表空间和空闲dm s盘区(extent)不是备份镜像的一部分。

It is also worth noting that temporary table Spaces and free DMS extents are not part of the backup image.

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