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# Manage thin pool allocations

Thin pools contain DATA volumes of the same emulation and the same configuration.

## Prerequisites

- You can only allocate thin pool capacity to bound thin volumes.
- You can perform this operation from the Volumes view. You can also perform this operation from storage group views. Depending from where you are performing this operation, some of the following steps may not apply.
- The Allocate/Free/Reclaim operations are not allowed on a storage group that has data reduction operations enabled.

## About this task

To start and stop allocating thin pool capacity from the Volumes view, complete the following steps:

## Steps

1. Select the storage system.
2. Select Storage > Volumes.
3. Select the volume type by selecting a tab.
4. Do one of the following:
   - To start thin pool allocation:
     - Select one or more volumes, click , and select Allocate/Free/Reclaim > Start.
     - If you select volumes that are not part of a storage group and select Allocate Full Volume Capacity, the Persist preallocated capacity through reclaim or copy flag must also be set. If you have selected volumes that are part of a storage group that has data reduction operations enabled, Allocate Full Volume Capacity and Persist preallocated capacity through reclaim or copy are not allowed and are disabled. If you have selected volumes that are part of a storage group that has data reduction operations disabled, you can select Allocate Full Volume Capacity and optionally select Persist preallocated capacity through reclaim or copy. Select Allocate Volumes, Free Volumes, or Reclaim Volumes.
   - To stop thin pool allocation:
     - Select one or more volumes, click , and select Allocate/Free/Reclaim > Stop.
     - Select Stop Allocate.
5. Do one of the following:
   - Click Run Now to perform the operation now.
   - Expand Run Now and click Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see Schedule jobs and Preview jobs.