Indeed, the alt_disk_copy is often used to clone the rootvg to a spare disk for regular on-line backup of rootvg.

对于 rootvg 的定期在线备份，常常使用 alt_disk_copy 把 rootvg 克隆到空闲磁盘上。

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On - line backup can be performed when the database is operated under the filing mode.

建议数据库运行在归档方式下运行热备份。

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The traditional protection has some shortcomings: long operation time of backup protection, not distinguishing overload from fault of line and so on.

传统保护存在后备保护动作时间过长和不能区分线路过载与故障等不足。

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On-line storage is behind remote backup and disaster recovery, on-line content sharing and video streaming, among many other applications currently popular with mobile as well as home-based smart connected devices.

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Backup generators came on line, and Entergy and SMG then worked to restore power.

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Storage in the cloud is a great thing and is a key element enabling many applications including on-line backup and collaborative work as well as social networking.

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