Use the Create FlashCopy Logical Drive Wizard to create a logical point-in-time image of another .
A flashcopy logical drive is the logical equivalent of a complete physical copy, but you create it much more quickly than
a physical copy. A flashcopy logical drive requires less disk space. In this release of the storage management software, the
logical drive from which you are basing the flashcopy, called the , must be a in your storage subsystem.
Valid Base Logical Drives
The Create FlashCopy Logical Drive option is not available from the pull-down menu or the right-mouse pop-up menu if you select an invalid base logical drive
before you start the wizard. The following logical drives are not valid base logical drives:
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Using the Create FlashCopy Logical Drive Wizard
Attention:
Risk of application errors – You cannot create a flashcopy for a logical drive that contains unreadable sectors.
Keep these guidelines in mind when you use the Create FlashCopy Logical Drive Wizard:
For operating system-specific instructions, refer to the Create FlashCopy Logical Drive Wizard - Additional Instructions online
help topic. If you fail to complete the additional steps required for your operating system, it might result in an inaccurate point-in-time image of the base logical drive or or in a VolumeCopy.
Unmounting the base logical drive does not apply when the base logical drive is the root disk of the host operating system.
Attention:
Possible loss of data redundancy – If the flashcopy logical drive is to be based on the root disk of the host operating system, the final point-in-time image
might not be completely consistent with the base logical drive.
Stop the host application accessing the base logical drive, and unmount the base logical drive.
In the Logical pane, select a valid base logical drive, and select Logical Drive >> FlashCopy >> Create.
Follow the directions on each wizard dialog, and click Next to move to the next wizard dialog.
Note:
Each wizard dialog has context-sensitive help. Click Help to view information applicable for that particular dialog.
After you have created one or more flashcopy logical drives, mount the base logical drive, and restart the host application
using that base logical drive.
In the Mappings tab of the Subsystem Management Window, assign between the flashcopy logical drive and the host that will access the flashcopy logical drive.
Note:
In some cases, conflicts might result from mapping the same host to both a base logical drive and its associated flashcopy
logical drive. This conflict depends on the host operating system and any logical drive manager software in use. For operating-system-specific
instructions, refer to the Create FlashCopy Logical Drive Wizard - Additional Instructions online help topic.
To register the flashcopy logical drive with the host operating system, run the host-based .
To associate the mapping between the physical storage subsystem name and the logical drive name, run the host-based utility.
Important:
If you will use this flashcopy on a regular basis (for example, for backup purposes), use the Disable FlashCopy option and the Re-create FlashCopy option to reuse the flashcopy. These actions alleviate the need to stop the host application and unmount the base logical
drive while the flashcopy is created again. Using the Disable FlashCopy option and the Re-create FlashCopy option also preserves the existing mappings to the flashcopy logical drive.
A Preview of the Create FlashCopy Logical Drive Wizard
These dialogs appear as part of the Create FlashCopy Logical Drive Wizard:
The Create FlashCopy Logical Drive Wizard - Introduction dialog defines a flashcopy logical drive and the physical components that are associated with a flashcopy logical drive.
The dialog lets you select either the Simple path or the Advanced path through the Create FlashCopy Logical Drive Wizard.
If free capacity does not exist or the available free capacity is unusable, a warning message appears.
The Create FlashCopy Logical Drive Wizard - Specify Names dialog lets you define the name of the flashcopy logical drive and the name of its associated flashcopy repository logical
drive.
The Create FlashCopy Logical Drive Wizard - Specify FlashCopy Repository Capacity dialog lets you specify the capacity of the flashcopy repository logical drive as a percentage of the capacity of the base
logical drive.
This dialog appears if you chose the Simple path:
The Create FlashCopy Logical Drive Wizard - Preview dialog provides a preview of the flashcopy parameters and the flashcopy repository parameters. The dialog lets you return
to previous dialogs to change the parameters.
This dialog appears if you chose the Advanced path:
The Create FlashCopy Logical Drive Wizard - Allocate Capacity dialog lets you select the Free Capacity node or the Unconfigured Capacity node on which to place the flashcopy repository
logical drive.
If you select the Free Capacity node in the Advanced path, these dialogs appear:
The Create FlashCopy Logical Drive Wizard - Advanced Parameter Settings dialog lets you define the flashcopy mapping parameter and the full conditions of the flashcopy repository logical drive.
The Create FlashCopy Logical Drive Wizard - Preview dialog provides a preview of the flashcopy parameters and the flashcopy repository parameters. The dialog lets you return
to previous dialogs to change the parameters.
If you select the Unconfigured Capacity node in the Advanced path, these dialogs appear:
The Create FlashCopy Logical Drive Wizard - Specify Array Parameters dialog lets you specify a new where the flashcopy repository will reside. It also lets you specify the level of the array that will meet the data storage requirements and the protection requirements of the flashcopy repository
logical drive.
The Create FlashCopy Logical Drive Wizard - Advanced Parameter Settings dialog lets you define the flashcopy mapping parameter, the threshold percentage full parameter, and the full conditions
of the flashcopy repository logical drive.
The Create FlashCopy Logical Drive Wizard - Preview dialog provides a preview of the flashcopy parameters and the flashcopy repository parameters. The dialog lets you return
to previous dialogs to change the parameters.