- Source Virtual Disk
- Snapshot Virtual Disk
- Repository Virtual Disk
You can copy a of data in two ways: you can make a point-in-time of the data, or you can copy the data to another virtual disk with a .
When you make a point-in-time snapshot of data on a virtual disk, the data is copied only one time. This type of copy is best used to back up data one time or when system resources are low. After you make a snapshot of data, you must set up the snapshot again to do the copy again.
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| Figure 16 Snapshot Virtual Disk | |
When you set up a virtual disk copy, you make a link between the and the . This link permits data to be copied more than one time. This type of copy is best used to back up data on the source virtual disk more than one time or when system resources are higher. After you set up the virtual disk copy, you can quickly re-copy the data on the source virtual disk to the target virtual disk without more setup. You also can configure how much system resources are devoted to the copy procedure.
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| Figure 17 Virtual Disk Copy | |
You can use a snapshot and a virtual disk copy to increase the efficiency of a data copy. For example, you can use the snapshot virtual disk as the source virtual disk of a virtual disk copy to complete backups without an impact to system resources.
Note:
Neither a snapshot nor a virtual disk copy uses mirroring, which is an automated process. You must start the data copy procedure each time you want to copy data.