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# View CKD volume details

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

## Steps

1. Select the storage system.
2. Select HOSTS > Mainframe.
3. Select a CKD volume and click to open the Details view.

   | NOTE: Depending on the method you used to open this view, some of the following properties may not appear.

   The following properties are displayed:
   - Masking Info—Number of other pools
   - Storage Groups—Number of Storage Groups
   - SRP—Number of Storage Resource pools (SRPs)
   - CKD Front End Paths—Number of CKD Front End Paths
   - RDF Info—SRDF Info.
   - CU Image Number—CU image number
   - Split Name—Split name
   - VOLSER—Physical name (also known as volume serial number (VOLSER)). VOLSER information is displayed if running a SMAS client server to zOS as described in Appendix C - Configuring SMAS to work in z/OS of the Unisphere for PowerMax Installation Guide. This value is only populated on a z/VM host.
   - UCB Address —UCB address (this value is only populated on a z/VM host)
   - Volume Name—Volume name.
   - Physical Name—Physical name (also known as volume serial number (VOLSER)). VOLSER information is displayed if running a SMAS client server to zOS as described in Appendix C - Configuring SMAS to work in z/OS of the Unisphere for PowerMax Installation Guide.
   - Volume Identifier—Volume identifier.
   - Type — Volume configuration.
   - Encapsulated Volume — Whether external volume is encapsulated. Relevant for external disks only.
   - Encapsulated WWN — World Wide Name for encapsulated volume. Relevant for external disks only.
   - Encapsulated Device Flag — Encapsulated device flag.
   - Encapsulated Device Array — Encapsulated device array.
   - Encapsulated Device Name — Encapsulated device name.
   - Status — Volume status.
   - Reserved — Whether the volume is reserved.
   - Capacity (GB) —Volume capacity in GBs.
   - Capacity (MB) —Volume capacity in MBs.
   - Capacity (CYL) —Volume capacity in cylinders.
   - Compression Ratio —Compression ratio.
   - Emulation — Volume emulation.
   - AS400 Gatekeeper — AS400 Gatekeeper indication.
   - Array ID — Storage system on which the volume resides.
   - Array Vol ID — Storage system volume name/number.
   - HP Identifier Name — User-defined volume name (1-128 alpha-numeric characters), applicable to HP-mapped devices. This value is mutually exclusive of the VMS ID.
   - VMS Identifier Name — Numeric value (not to exceed 32766) with relevance to VMS systems. This value is mutually exclusive of the HP ID.
   - Nice Name — Nice name generated by Enginuity.
   - WWN — World Wide Name of the volume.
   - External Identity WWN — External Identity World Wide Name of the volume.
   - DG Name — Name of the device group in which the volume resides, if applicable.
   - CG Name — Name of the device group in which the volume resides, if applicable.
   - Attached BCV — Defines the attached BCV to be paired with the standard volume.
   - Attached VDEV TGT Volume — Volume to which this source volume would be paired.
   - RDF Type — RDF configuration.
   - Geometry - Type — Method used to define the volume's geometry.
   - Geometry - Number of Cylinders — Number of cylinders.
   - Geometry - Sectors per Track — Number of sectors per track, as defined by the volume's geometry.
   - Geometry - Tracks per Cylinder — Number of tracks per cylinder, as defined by the volume's geometry.
   - Geometry - 512 Block Bytes — Number of 512 blocks, as defined by the volume's geometry.
   - Geometry - Capacity (GB) —Geometry capacity in GBs.
   - Geometry - Limited — Indicates whether the volume is geometry limited.
   - SSID — Subsystem ID.
   - Capacity (Tracks) — Capacity in tracks.
   - SA Status — Volume SA status.
   - Host Access Mode — Host access mode.
   - Pinned—Whether the volume is pinned.
   - RecoverPoint Tagged—Indicates whether volume is tagged for RecoverPoint.
   - Service State — Service state.
   - Defined Label Type — Type of user-defined label.
   - Dynamic RDF Capability — RDF capability of the volume.
   - Mirror Set Type — Mirror set for the volume and the volume characteristic of the mirror.
   - Mirror Set DA Status — Volume status information for each member in the mirror set.
   - Mirror Set Invalid Tracks — Number of invalid tracks for each mirror in the mirror set.
   - Priority QoS — Priority value assigned to the volume.Valid values are 1 (highest) through 16 (the lowest).
   - Copy Pace - RDF — Copy Pace - RDF.
   - Copy Pace - Mirror Copy — Copy Pace - Mirror Copy.
   - Copy Pace - Clone — Copy Pace - Clone.
   - Copy Pace - VLUN — Copy Pace - VLUN.
   - Dynamic Cache Partition Name — Name of the cache partition.
   - Compressed Size (GB) — Compressed Size (GB)
   - Compressed Percentage — Compressed Ratio (%)
   - Compressed Size Per Pool (GB) — Compressed Size Per Pool (GB)
   - XtremSW Cache Attached — Indicates whether XtremSW cache is attached to the volume.
   - Base Address — Base address.
   - AS400 Gatekeeper — AS400 Gatekeeper indication.
   - Mobility ID Enabled — Indication if Mobility ID is enabled.
   - GCM — GCM indication.
   - Optimized Read Miss — Cacheless read miss status.
   - Persistent Allocation — Persistent Allocation indication.
   - PowerPath Hosts — Number of PowerPath hosts.
   - Mounted — Mounted indication.
   - Process — Process.
   - Last time used — Last time used.

   The Details view links you to views displaying objects contained in and associated with the virtual volume. Each link is followed by a number, indicating the number of objects in the corresponding view. For example, clicking Storage Group opens a view listing the storage groups that are associated with the volume.