The management GUI contains a series of pre-established configuration options called presets. Presets are commonly used settings to quickly configure objects on the system.
Presets are available for creating volumes, setting FlashCopy mappings, and establishing RAID levels for array configurations.
| Preset | Purpose |
|---|---|
| Basic | Creates a single volume copy on one site. |
| Mirrored | Creates copies of a volume that exist on one site. |
| Custom | Creates volumes with customized properties. |
| Preset | Purpose |
|---|---|
| Backup | Creates a point-in-time replica of the production data. After the copy
completes, the backup view can be refreshed from the production data, with minimal copying of data
from the production volume to the backup volume. This preset automatically creates a volume with the same properties as the source volume. The preset creates an incremental FlashCopy mapping with a background copy rate of 50. |
| Clone | Creates an exact replica of the volume, which can be changed without
affecting the original volume. After the copy operation completes, the mapping that was created by
the preset is automatically deleted. This preset automatically creates a volume with the same properties as the source volume and creates a FlashCopy mapping with a background copy rate of 50. The FlashCopy mapping is configured to automatically delete itself when the FlashCopy mapping reaches 100% completion. |
| Snapshot | Creates a point-in-time view of the production data. The snapshot is not
intended to be an independent copy but is used to maintain a view of the production data at the time
that the snapshot is created. This preset automatically creates a thin-provisioned target volume with 0% of the capacity allocated at the time of creation. The preset uses a FlashCopy mapping with 0% background copy so that only data that is written to the source or target is copied to the target volume. |
Array configuration presets are used to configure all available drives in an array, based on the recommended values for the RAID level and drive class. The system determines the drive class by detecting information about all of the installed hardware, such as the technology, speed, capacity, block size, and I/O group. To display information about all of the drive classes that are available on the system, enter the lsdriveclass command.
The system then recommends a configuration that uses all of the drives to build arrays that are protected with the appropriate number of rebuild areas or spare drives. Use the lsarrayrecommendation command to display the system recommendations for an array configuration and the expected storage pool capacity. In the command output, the first row of information that is displayed shows the default values the management GUI uses to create the configuration.
To maintain redundancy, each preset creates a specific number of drives per array and number of spare drives or rebuild areas. Presets also determine whether the drives in the array are balanced across enclosure chains to protect the array from enclosure failures. Each preset has a specific number of drives per array and the number of spare drives to maintain redundancy.