Learn About FlashCopy Logical Drive Maintenance

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When you create a FlashCopy logical drive, you specify where to create the repository logical drive , its capacity, threshold level warning, and other parameters. The repository logical drive capacity is created as a percentage of the base logical drive and contains the copy-on-write data. The storage management software provides a warning message when your repository logical drive exceeds the threshold level .

Important:

FlashCopy Logical Drive Maintenance

The default repository logical drive capacity is set to 20% of the base logical drive, that is if enough free capacity exists to create a repository logical drive of this size. The default threshold level for the repository logical drive is set to 50%. If you are not sure how large to make the repository logical drive or how high to set the repository logical drive full warning, accept the default settings. You can estimate later how quickly the FlashCopy's repository capacity is being used. For more information, see Learn About Estimating Repository Logical Drive Life Expectancy.

Viewing FlashCopy Logical Drive Failure Settings

To see the current failure settings:

1

Select a repository logical drive in the Logical View of the Subsystem Management Window.

2

Select either the Logical Drive >> Properties pull-down menu option, or Properties from the right-mouse pop-up menu.

Result: The Repository Logical Drive - Properties dialog is displayed.

3

Select the Capacity tab to view the currently defined settings.

If the repository logical drive is set to fail the FlashCopy logical drive when it becomes full, its data will not be recoverable and the FlashCopy cannot be accessed. The only available option (if this situation occurs) is to delete the FlashCopy logical drive or re-create the FlashCopy logical drive to create a new point-in-time image.

If the repository logical drive is set to fail writes to the base logical drive, the data is recoverable, but the repository logical drive capacity must be increased before writes to the base logical drive are not rejected. For more information, see Increasing the Capacity of a Repository Logical Drive.

Important:

Related Topics

Introduction to FlashCopy Logical Drives

Learn About Disabling and Re-creating a FlashCopy Logical Drive

Learn About Estimating Repository Logical Drive Life Expectancy

Increasing the Capacity of a Repository Logical Drive