The management GUI contains a series of preestablished configuration options called presets that use commonly used settings to quickly configure objects on the system.
Presets are available for creating volumes and FlashCopy® mappings and for setting up RAID configuration.
| Preset | Purpose |
|---|---|
| Generic | Creates a striped volume of the specified size in the specified storage pool. |
| Thin provision | Creates a thin-provisioned volume of the specified size with the autoexpand feature enabled in the specified storage pool. Sets the volume and the storage pool warning size to 80%. Only the specified percentage of the capacity of the volume is allocated to the volume at the time of creation. The default value is 2% of the volume capacity. |
| Mirror | Creates a volume with two copies of the data in two storage pools to protect against storage pool failures. |
| Thin mirror | Creates a volume with two thin-provisioned copies of the data in two storage pools to protect against storage pool failures. For details about how the thin-provisioned copies are configured, see the thin-provision preset information in this table. |
| Compressed | Creates a thin-provisioned volume where data is compressed when it is written and stored on the volume. Only the specified percentage of the capacity of the volume is allocated to the volume at the time of creation. The default value is 2% of the volume capacity. |
| Preset | Purpose |
|---|---|
| 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 written to the source or target is copied to the target volume. |
| 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. |
| 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. |
RAID configuration presets are used to configure all available drives based on recommended values for the RAID level and drive class. The system detects the installed hardware then recommends a configuration that uses all the drives to build arrays that are protected with the appropriate amount of spare drives. Each preset has a specific goal for the number of drives per array, the number of spare drives to maintain redundancy, and whether the drives in the array are balanced across enclosure chains, thus protecting the array from enclosure failures.
| Preset | Purpose | RAID level | Drives per array goal | Spare drive goal |
|---|---|---|---|---|
| RAID 5 | Protects against a single drive failure. Data and one strip of parity are striped across all array members. | 5 | 9 | 1 |
| RAID 6 | Protects against two drive failures. Data and two strips of parity are striped across all array members. | 6 | 10 | 1 |
| RAID 10 | Provides good performance and protects against at least one drive failure. All data is mirrored on two array members. | 10 | 8 | 1 |
| RAID 0 | Provides no protection against drive failures. Use only for temporary volumes. | 0 | 8 | 0 |
| RAID 1 | Mirrors data to provide good performance and protection against drive failure. The mirrored pairs are spread between storage pools to be used for the Easy Tier® function. | 1 | 2 | 1 |
| Balanced RAID 10 | Provides good performance and protects against at least one drive failure. All data is mirrored on two array members. | 10 | 8 | 1 |
Note: In all RAID instances, drives
in the array are balanced across enclosure chains if possible.
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