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Adding a Logical Drive to a Logical Volume

A logical volume contains two or more logical drives and can be divided into a maximum of 32 partitions. During operation, the host sees a nonpartitioned logical volume or a partition of a logical volume as one single physical drive.

NOTE: Logical volumes are unsuited to some modern configurations such as Sun Cluster environments, and do not work in those configurations. Use logical drives instead.

Caution: On UNIX systems, before adding new logical drives to existing configurations, you must unmount any file systems that are attached to the array.

  1. Create a logical drive as described in Steps 1-8 in Adding a Logical Drive or Adding a Logical Volume From New Logical Drives.
  2. NOTE: Do not partition the logical drive that you are adding to the logical volume. A logical drive that has been partitioned cannot be added to a logical volume.

  3. Before you click Commit, to add the logical drive to a logical volume, click Add to LV.
  4. The logical drive is added to the LV Definition box. The total size of the logical volume is displayed in the Available Size (MB field.

    NOTE: Because the logical volume has not been partitioned yet, the Part Size (MB), and the Available Size (MB) are equal. A single logical volume is considered to be a single partition.

    NOTE: Mixing SATA and FC logical drives to create a logical volume is not supported.

  5. To create another logical drive to add to the logical volume, click New LD.
  6. Create the logical drive and add it to the logical volume by clicking Add to LV.
  7. Repeat this step for every logical drive you want to add to the logical volume.

  8. To create a partition, see Partitioning an Existing Logical Drive or Logical Volume/Creating a Partition.
  9. When you have finished adding logical drives to the logical volume, to create another logical volume or an individual logical drive, click Commit LV.
  10. When you have finished creating logical volumes and do not want to create an individual logical drive, click Commit.

    NOTE: When you are finished creating logical volumes and want to exit the New Configuration window, if you accidentally click Commit LV instead of Commit, you will have to create another logical drive; otherwise, you have to click Cancel and configure the logical volume again.

  11. (HP-UX OS only). To ensure that the environment is stable and accurate after making configuration changes, you need to run the ioscan -fnC disk command.
  12. NOTE: If you used System Administrator Manager (SAM) to unmount the file system, make sure it is closed before running the ioscan command.

  13. (IBM AIX OS only). To ensure that the environment is stable and accurate after making configuration changes, you must update the Object Data Manager (ODM) as explained in Updating the Object Data Manager on an IBM AIX host.
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