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Configuring volumes for space-reserved LUNs with Snapshot reserve

When you pre-allocate space for LUNs and Snapshot copies, you guarantee that the space is used just for those LUNs and Snapshot copies. The pre-allocated space for the LUNs and the Snapshot copies is not available to any other LUNs or Snapshot copies within that same volume.

Before you begin

You have created a volume.

About this task

You should use a host-based Snapshot copy creation software such as SnapDrive to create your Snapshot copies. The following configurations apply at the volume level.

Steps

  1. Use the vol options command to set space guarantee to volume.
    Example
    vol options vol1 guarantee volume
  2. Use the vol options command to set fractional reserve to 100.
    Example
    vol options vol1 fractional_reserve 100
  3. Use the vol autosize command to disable volume autosize.
    Example
    vol autosize vol1 off
  4. Use the snap reserve command to change the snap reserve setting to 0.
    Example
    snap reserve vol1 0
  5. Use the snap reserve command to verify the setting change.
    Example
    snap reserve vol1
  6. Use the snap sched command to disable the scheduled creation of Snapshot copies.
    Example
    snap sched vol1 0 0 0
  7. Use the snap sched command to verify scheduled creation of Snapshot copies has been disabled.
    Example
    snap sched vol1
  8. Use the vol status command to verify changes.
    Example
    vol status vol1 -v
  9. Use the snap autodelete command to disable autodelete.
    Example
    snap autodelete vol1 off
  10. Use the snap autodelete command to verify your changes.
    snap autodelete vol1

Result

The volume is now configured for space-reserved LUNs with Snapshot reserve. You can now create your LUNs for your volume.