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# View volumes

A storage volume is an identifiable unit of data storage. Storage groups are sets of volumes.

## About this task

To see the CKD volumes in a CU image, see View CKD volumes in CU image.

To view volumes from the Hosts > Mainframe dashboard, complete the following steps:

## Steps

1. Select the storage system.
2. Select Hosts > Mainframe and click Volumes in the Summary panel.
   The Volumes list view is displayed. Use this list view to view and manage the volumes.

   The following properties display: however, not all properties may be available for every volume type:

   - Name—Assigned volume name
   - Type—Type of volume
   - Allocated %—% of the volume that is allocated
   - Capacity (CYL)—Volume capacity in cylinders
   - Status—Volume status
   - Emulation—Emulation type for the volume
   - Host Paths—Number of masking records for the volume
   - Reserved—Indicates whether the volume is reserved.
   - Split—The name of the associated split
   - CU Image —The number of the associated CU image
   - Base Address—Base Address

   The following controls are available, however, not all controls may be available for every volume type:

   - —View CKD volume details
   - Create— Create volumes
   - Expand— Expand existing volumes
   - —Delete operations
   - Create SG— Create storage groups
   - Set Volumes > Emulation— Set volume emulation
   - Set Volumes > Attribute— Set volume attributes
   - Set Volumes > Identifier— Set volume identifiers
   - Set Volumes >Status— Set volume status
   - Set Volumes > Replication QoS— QOS for replication
   - Set Volumes > Set SRDF GCM— Set the SRDF GCM flag
   - Set Volumes > Reset SRDF/Metro Identity— Reset original device identity
   - Allocate/Free/Reclaim > Start — Manage thin pool allocations
   - Allocate/Free/Reclaim > Stop— Manage thin pool allocations
   - Configuration > Change Volume Configuration— Change volume configuration
   - Configuration > Duplicate Volume— Duplicate volumes
   - Configuration > z/OS Map— z/OS map from the volume list view
   - Configuration > z/OS Unmap— z/OS unmap from the volume list view