历史资料被损坏时，这个综合的平台具有备份和恢复系统。

Historical data has been damaged, this integrated platform backup and recovery system.

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在下面的例子中，我将演示如何使用JFS2快照来在升级过程中备份和恢复文件系统。

In the following examples, I demonstrate how I used JFS2 snapshots to backup and recover a file system during an upgrade activity.

youdao

策略3：系统备份和恢复。

Strategy 3: System backup and restore.

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