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# Modify Storage Resource Pool details

A Storage Resource Pool is a collection of data pools for capacity and performance management.

## Steps

1. Select the storage system.
2. Select Storage > Storage Resource Pools to open the Storage Resource Pools view.
3. Click Modify.
4. Modify any number of the following:
   - Storage Resource Pool Name—Name of the storage resource pool - to change this value, type a new description and click Apply. The name of the storage resource pool must be unique, and it cannot exceed 32 characters. It can include only alphanumeric, underscore, and hyphen characters, but cannot begin with an underscore or hyphen character.
   - Description—Optional description of the pool - to change this value, type a new description and click Apply. The description cannot exceed 127 characters. It can contain only alphanumeric, hyphen, underscore, space, period, and comma characters.
   - Reserved Capacity % (0 - 80)—The percentage of the capacity of the Storage Resource Pool to be reserved for volume write I/O activities. Valid values for the percentage are from 1 to 80. NONE disables it. For example, if you set the reserved capacity on a Storage Resource Pool to 30%, then the first 70% of the pool capacity is available for general-purpose operations (host I/O allocations, local replication tracks, and SRDF/A DSE allocations) and the final 30% of the pool capacity is reserved strictly for volume write I/O activities. Note that existing TimeFinder snapshot sessions created on volumes in the Storage Resource Pool are invalid if the free capacity of the Storage Resource Pool, as a percentage of the usable capacity, goes below the reserved capacity.
   - FBA Over Provisioning Threshold—Enter a value between 50 and 2000 - this parameter is only applicable for a mixed SRP associated with a storage system running PowerMaxOS 10 (6079).
   - CKD Over Provisioning Threshold—Enter a value between 50 and 2000 - this parameter is only applicable for a mixed SRP associated with a storage system running PowerMaxOS 10 (6079) .
   - SRP Over Provisioning Max Threshold—Enter a value between 50 and 200 - this parameter is only applicable for a single emulation SRP (FBA or CKD) associated with a storage system running PowerMaxOS 10 (6079) .
   - Usable by RDFA DSE—Specifies whether the Storage Resource Pool can be used for SRDF/A DSE operations. This field does not display for external SRPs. The maximum amount of storage from a Storage Resource Pool that can be used for DSE is controlled by the system-wide dse_max_cap setting, as described in the Solutions Enabler SRDF Family CLI User Guide.
5. Click OK.