Extending a logical volume that contains remote site mirrors

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You can increase the size of a logical volume by adding unallocated physical partitions to it from within the volume group. The GLVM command for extending the logical volume uses the Super Strict inter-disk allocation policy for the logical volumes and assumes that only two sites are configured, one of which is a remote site.

About this task

To extend a logical volume that contains remote site mirrors:

Procedure

  1. Enter smit
  2. In SMIT, select System Storage® Management (Physical and Logical Storage) > Geographic Logical Volume Manager Utilities > Geographically Mirrored Logical Volumes > Extend a Logical Volume that Contains a Remote Site Mirror and press Enter.

    SMIT displays a list of logical volumes.

  3. Select a logical volume to which you want to add physical partitions and press Enter.
  4. Enter or review field values as follows:
    Table 1. Extend a Logical Volume that Contains a Remote Site Mirror fields
    Field Value
    Logical Volume Name The name of the logical volume for which you want to add physical partitions.
    Number of Additional Logical Partitions Specify the number of logical partitions you want to add to the logical volume.
    Note: Sufficient space must exist on each mirror copy to set aside for the new physical partitions.

    The system requests the additional physical partitions first from the pool of unused but available partitions configured on the physical volume and on the remote physical volume.

    If there is not enough free partitions in the pool of available partitions, the system requests them from the volume group pool.
    Position on Physical Volume The default is Middle. This option uses the default value from the standard AIX® LVM panel.
    Range of Physical Volumes The default is Minimum. This option uses the default value from the standard AIX LVM panel.
    Allocate each logical partition copy on a SEPARATE physical volume? Super Strict. This forces each complete copy of the logical volume to reside on separate sets of physical volumes (and remote physical volumes).
    Synchronize the data in the new logical partition copies? The default is No. Select No.

    Physical partitions marked as stale must be updated to contain the same information as valid physical partitions. This process, called resynchronization, can be done at varyon time or can be started any time while the system is running. Until the stale partitions have been rewritten with valid data, they are not used to satisfy read requests nor are they written to based on write requests.
  5. Press Enter. The system examines the logical volume and determines how to extend it by the specified number of physical partitions.
  6. Verify the configuration.