Planning: MD3200i Series Storage Array Terms and Concepts 53Source Virtual DiskWhen you create a virtual disk copy, a copy pair consisting of a source virtualdisk and a target virtual disk is created on the same storage array. When avirtual disk copy is started, data from the source virtual disk is copiedcompletely to the target virtual disk.Target Virtual DiskWhen you start a virtual disk copy, the target virtual disk maintains a copy ofthe data from the source virtual disk. You can choose whether to use anexisting virtual disk or create a new virtual disk as the target virtual disk. Ifyou choose an existing virtual disk as the target, all data on the target isoverwritten. A target virtual disk can be a standard virtual disk or the sourcevirtual disk of a failed or disabled snapshot virtual disk.NOTE: The target virtual disk capacity must be equal to or greater than the sourcevirtual disk capacity.When you begin the disk copy process, you must define the rate at which thecopy is completed. Giving the copy process top priority slightly impacts I/Operformance, while giving it lowest priority makes the copy process longer tocomplete. You can modify the copy priority while the disk copy is in progress.For more information, see the online help topics.Virtual Disk RecoveryYou can use the Edit host server-to-virtual disk mappings feature to recoverdata from the backup virtual disk. This functionality enables you to unmapthe original source virtual disk from its host server, then map the backupvirtual disk to the same host server.Ensure that you record the LUN used to provide access to the source virtualdisk. You need this information when you define a host server-to-virtual diskmapping for the target (backup) virtual disk. Also, be sure to stop all I/Oactivity to the source virtual disk before beginning the virtual disk recoveryprocedure.Using Snapshot and Disk Copy TogetherYou can use the Snapshot Virtual Disk and Virtual Disk Copy premiumfeatures together to back up data on the same storage array, or to restore thedata on the snapshot virtual disk to its original source virtual disk.
