Actions on the Volumes by Pool page
On the Volumes by Pool page, you can create and modify volumes, and view volume and pool properties.
Volume actions
- Expand
- Increase the capacity of one or more volumes to accommodate your growing storage requirements. Volumes can remain connected to the host during expansion.
- Redistribute
- Redistribute the capacity of one or more volumes in the current pool. You can redistribute the capacity to change the allocation method of the volume or to redistribute the capacity across new arrays that were added to the pool that contains the volume.
- Migrate
- Migrate a set of volumes from one pool to another pool within the same node. You might need to
migrate a volume because the drives that are currently hosting the volumes might require
maintenance. Migration can also reduce costs by eliminating excess drives.Note: Before you migrate, ensure that the target pool has sufficient space.
To begin the migration process, click Start and then select the target pool in the Migrate Volume window. You can also manage the migration process by clicking actions to Pause, Resume, or Cancel the migration process.
- Safeguarded
- You can manage safeguarded virtual backup capacity with the following options:
- Configure Capacity
- Opens the Configure Safeguarded Capacity window to create safeguarded virtual backup capacity for safeguarded backups of the volume. For more information about determining a backup capacity multiplier, see Configuring safeguarded virtual capacity.
- Expand Capacity
- Opens the Expand Safeguarded Backup Capacity window to increase safeguarded virtual backup capacity for safeguarded backups of the volume. For more information about determining a backup capacity multiplier, see Configuring safeguarded virtual capacity.
- Delete Capacity
- Delete safeguarded virtual backup capacity for safeguarded backups.
- Migrate Capacity
- Migrate safeguarded virtual backup capacity from one pool to another pool within the same node.
The schedule for safeguarded backups will be maintained at the new location.
To begin the migration process, click Start and then select the target pool in the Migrate Safeguarded Backup Capacity window. You can also manage the migration process by using actions to Pause, Resume, or Cancel the migration.
- Assign to Drive Class
- Assign the volume to an Easy Tier® drive class, or
specify a tier that the volume should not use. This action opens the Assign Volume to
Drive Class window, which you can use to select the drive class. If you select a drive
class that is different from the drive class that is in use by the volume, Easy Tier moves the volume to the new drive class. The following options are
available, depending on the drive classes that are in the pool:
- Flash Tier 0
- Assign the volume to the high performance flash tier.
- Flash Tier 1
- Assign the volume to the first tier of high capacity flash drives.
- Flash Tier 2
- Assign the volume to the second tier of high capacity flash drives.
- Unassign from Drive Class
- Unassign the volume from an Easy Tier drive class tier and allow Easy Tier to manage the volume automatically again.
- Rename
- Rename one or more volumes as a way of reorganizing or redefining the purpose of your volumes, as needs change.
- Manage Aliases
- Opens the Aliases by volume window to create, delete, and view aliases for a volume.
- Map to Host or Cluster
- Map one or more volumes to a host or hosts within a cluster
by using the Map Volumes to Hosts or Clusters window.
When you map a volume to a host, you can choose the LUN that the volume gets. If the host is assigned to a cluster, the mapping is private.
When you map a volume to a cluster, the volume is mapped to all hosts in the cluster and the mapping is public. You can choose the LUN that the volume gets.
- Delete
- Delete one or more volumes that you no longer need to improve your storage organization. Before deleting volumes, remove or backup all of the data that is stored on the volumes. By checking Force deletion, you force deletion of the volumes even when allocated to a host system or a copy services relationship. A Force deletion does not do checks of the volume group, path group, or copy services. By not checking Force deletion, the system does checks of the volume group, path group, or copy services.
- Reinitialize
- Reinitialize a thin provisioned volume. Reinitializing a volume frees up storage, but also results in data loss.
- Host Mappings
- View the host mappings for a volume to see all the hosts that a single volume is assigned to without having to individually check each host.
- Properties
- View the properties of a volume, such as the state and capacity.
Pool actions
- Create Volumes
- Create one or more volumes across a pool or a pool pair, by specifying the name prefix, quantity
of volumes, capacity, and capacity units (depending on the volume type, fixed block, or CKD). For
CKD volumes, you must also specify the LSS range.
Note: LSS is synonymous with logical control unit (LCU) and subsystem identification (SSID).
You can also assign the new volume to a host or host cluster.
Preset configurations for FB and CKD storage types simplify the process of creating volumes, or you can use the custom mode to control the settings. In preset mode, the storage system automatically distributes the volumes between the two selected pools, one on each node to help balance the processing workload.
- Rename
- Rename a pool as a way of redefining the purpose of your pool, as needs change.
- Merge
- Form a new pool by merging two or more pools of the same storage type (fixed block or count key
data). Arrays that are assigned to the pools that are being merged are assigned to the new pool.
When you merge pools, you create a larger pool that allows logical volumes to be distributed over a greater number of arrays, which improves overall performance in the presence of skewed or unbalanced workloads. Volumes that existed in the previous pools can be redistributed over the set of arrays in the merged pool. During this process, all of the volumes in the merging pools remain accessible to the hosts.
- Modify Thresholds
- Change the threshold for the pool capacity, TSE (Track Space Efficient) repository, and ESE (Extent Space Efficient) repository.
- Redistribute Volumes
- Redistribute the capacity of all volumes in the pool. You can redistribute the capacity to change the allocation method of the volumes or to redistribute the capacity across new arrays that were added to the pool.
- Delete
- Delete one or more pools that you no longer need. You cannot delete pools that have volumes. If the pool contains data, you must first delete the data on the associated volumes before you can delete the pool. If any of the pools have arrays that are assigned to them, the arrays are unassigned when the pool is deleted.
- Performance
- Opens the Performance page to display graphs that track performance
indicators for the pool. Select from the following options:
- IOPS
- Displays the number of requests that were processed on the arrays in the pool, in thousand I/O operations per second (KIOPS) for the selected I/O operation type (read, write, and total), averaged over one minute.
- Latency
- Displays the response time in milliseconds (ms) for the selected I/O operations (read, write, or average of both) that were processed on the arrays in the pool, averaged over one minute.
- Bandwidth
- Displays the number of MBs per second (MBps) for the selected bandwidth type (read, write, or total) that was processed on the arrays in the selected pools, averaged over one minute.
- Properties
- View the properties for a pool such as the capacity, number of volumes, and encryption status.