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# View capacity dashboard for a specific storage system (HYPERMAX OS 5977 or PowerMaxOS 5978)

The storage system capacity dashboard allows you to see the amount of capacity your storage system is provisioned for, and the amount of that provisioned capacity that has been effectively used. You can also see how efficient the storage system is in using data reduction technologies.

## Prerequisites

See Roles and associated permissions to determine the user roles that can perform this task.

## About this task

Unisphere for PowerMax provides a capacity dashboard which displays the state of their system in terms of resource and capacity usage from a usable and logical perspective. It displays usage against predefined thresholds and displays how these values have changed over time. The dashboard includes time correlated charts to show the impact of DRR on usable storage.

To view the Capacity dashboard view for a storage system running PowerMaxOS 10 (6079), see View capacity dashboard for a specific storage system (PowerMaxOS 10 (6079)). To view the Capacity dashboard view for a storage system running HYPERMAX OS 5977 or PowerMaxOS 5978 see the following steps:

## Steps

1. Select a storage system running HYPERMAX OS 5977 or PowerMaxOS 5978.
   The system health dashboard is displayed by default. You can hover over Capacity to view the capacity summary for the storage system.
2. Click Capacity, select the system or an SRP instance and view the following items:

   System has been selected, and the Show Detailed slider has been selected:

   - A graphical representation for the storage system of the effective, physical, provisioned, and snapshot capacity (used = blue and free = grey) and the percentage that is used is displayed. A textual representation of the effective, physical, provisioned, snapshot, and physical provisioned capacity is also displayed.
     - Effective–The total represents the total amount of effective used capacity. Effective capacity is limited by physical capacity and effective capacity resources in systems that support data reduction.
     - Physical–The total represents the total amount of available physical capacity (displayed if you turn on the Show Detailed slider).
     - Provisioned–The total represents the total amount of provisioned logical capacity.
     - Snapshot–The total represents the sum of all existing snapshots.
     - Provisioned Physical Capacity–The percentage that is displayed represents the amount of provisioned capacity in relation to the amount of physical capacity. This number can exceed 100% as the system is designed to use efficiency features such as compression and deduplication.
   - System Usage is displayed if you turn on the Show Detailed slider. The information is displayed in terms of System Meta data used, Replication Meta Data, and Front-End Meta Data. You can click Analyze Trend to analyze trends across metrics particular to capacity and usage. Trending shown is for Metadata usage, Subscribed Capacity, Snapshot Capacity, and Usable Capacity.
     - Metadata trending captures System, Replication, Front end, and Back-end
     - Subscribed capacity trending captures all (nonshared and shared) allocated against total subscribed capacity.
     - Snapshot capacity trending captures all (shared and nonshared) modified capacity against total snapshot capacity.
     - Usable capacity trending captures all (user, system, temp) used capacity against total usable capacity.

     | NOTE: The data that is shown depends on the code level the system is running. Front-end meta data is not shown for systems running HYPERMAX OS 5977.

   - Efficiency is also displayed in terms of Overall Efficiency Ratio, Data Reduction (Ratio and Enabled Percent-Enabled Percent is the % of Storage Groups on the array that have Data Reduction Enabled), Virtual Provisioning savings, and Snapshot savings.
   - Hovering over the Data Reduction section of the Efficiency report results in a tooltip appearing that displays the Unreducible Capacity and Reducible Capacity. Reducible Capacity is further broken down to display Deduplication and Compression savings, Pattern Detection savings, and Data Reduction Ratio on Reducible.

   SRP instance has been selected:

   - A graphical representation of the effective, provisioned, and snapshot capacity (used = blue and free = grey) of the system and the percentage that is used is displayed. On a single SRP array, that SRPs Effective Used Capacity Threshold is displayed on the System Effective Capacity bar.
     - Effective–The total represents the total amount of effective used capacity. Effective capacity is limited by physical capacity and effective capacity resources in systems that support data reduction.
     - Provisioned–The total represents the total amount of provisioned logical capacity.
     - Snapshot–The total represents the sum of all existing snapshots.
   - Headroom details are also displayed. Headroom is displayed by default as an overall figure but can also be filtered to display headroom for OLTP, OLTP + Replication, DSS, DSS + Replication, and None. The headroom that is displayed depends on the code level of the system—systems running HYPERMAX OS 5977 only show Diamond service levels and a combination of workload types. Systems running PowerMaxOS 5978 and later show headroom for the different service level types (the code level does not support workload types).
   - Efficiency is also displayed in terms of Overall Efficiency Ratio, Data Reduction (Ratio and Enabled Percent), Virtual Provisioning savings, and Snapshot savings.
   - Hovering over the Data Reduction section of the Efficiency report results in a tooltip appearing that displays the Unreducible Capacity and Reducible Capacity. Reducible Capacity is further broken down to display Deduplication and Compression savings, Pattern Detection savings, and Data Reduction Ratio on Reducible.

   The SRP capacity dashboard reports the capacity and efficiency breakdown of an SRP. For PowerMaxOS 5978 storage systems running 9.1 or later, FBA and CKD devices can be configured in a single SRP. A single SRP reduces the cost of storage array ownership for a mixed system and allows the efficient management of drive slot consumption in the array. Where the SRP is of mixed emulation, you can select by emulation to examine breakdown.

   The following controls are available when an SRP instance is selected) from the Actions panel:

   - STORAGE GROUP DEMAND— View Storage Group Demand Reports
   - SERVICE LEVEL DEMAND— View Service Level Demand Reports
   - COMPRESSIBILITY— View compressibility reports

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