Create FlashCopy Logical Drive Wizard: Advanced Parameter Settings

Related Topics

This screen allows you to specify the advanced parameter settings for the FlashCopy logical drive and FlashCopy repository logical drive .

Procedure

1

You have two choices for the FlashCopy logical drive-to-LUN mapping parameters:

  • Automatic

    The logical drive is automatically assigned a Logical Unit Number (LUN) and is placed in the Default Group in the Mappings View. The Default Group designates any logical drives that are accessible by the hosts connected to the storage subsystem that do not have specific logical drive-to-LUN mappings. Specific logical drive-to-LUN mappings are only allowed if Storage Partitioning is enabled.

    The Automatic selection is the only option available if Storage Partitioning is not enabled.

    You can change the default mapping at a later time using the Mappings View. For more information, see Changing a Logical Drive-to-LUN Mapping.

  • Map Later with Storage Partitioning

    The logical drive is not assigned a Logical Unit Number (LUN). The FlashCopy logical drive will not be seen by any hosts until you assign a LUN and specify the hosts (logical drive-to-LUN mapping), using the Mappings View.

    The FlashCopy logical drive cannot be accessed until you make a specific logical drive-to-LUN mapping using the Mappings View in the Subsystem Management Window. This is the recommended choice if you want to grant access to a specific host running a backup applications, so that the FlashCopy logical drive data can be read and backed up while the base logical drive remains online and user-accessible by other hosts.

    For more information, see Using the Storage Partitioning Wizard.

    Note: This option is not available if you do not have Storage Partitioning enabled.

2

The percentage full parameter is set via spinner box.

Use the spinner box to indicate the repository full percentage (of total capacity) before an event is logged to the Event Log. The default value is 50%.

Important: Ensure that enough notification time is allocated to allow the appropriate actions to be taken before the FlashCopy repository logical drive's capacity becomes full.

Note:

  • The spinner box increases and decreases by 1% increments.
  • You can type a number in the spinner box. Any value that you type over 100 will default back to 100 because 100% is the maximum percentage full.
  • You can change the threshold percentage full parameter later by selecting the FlashCopy repository logical drive and then using the Logical Drive >> Properties option.

3

Two FlashCopy repository logical drive full conditions are available:

  • Fail FlashCopy logical drive

    When the FlashCopy repository logical drive becomes full, the software fails the associated FlashCopy logical drive. This is the default policy. The base logical drive remains online and user accessible and writeable. The FlashCopy logical drive is no longer valid.

  • Fail writes to base logical drive

    When the FlashCopy repository logical drive becomes full, the software fails writes to the base logical drive. The FlashCopy logical drive is preserved and remains valid since no new copy-on-write data is generated for the FlashCopy repository logical drive.

Note: You can change the FlashCopy repository logical drive full condition later by selecting the FlashCopy repository logical drive and then using the Logical Drive >> Properties option.

4

Select Next to continue the FlashCopy creation process.

Related Topics

Creating a FlashCopy Logical Drive Using the FlashCopy Logical Drive Wizard

Managing Logical Drives