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# Set copy pace (QoS) for storage groups

The QoS (Quality of Service) feature adjusts the data transfer (copy) pace on individual volumes or groups of volumes (DGs or SGs) for certain operations.

## Steps

1. Select the storage system.
2. Select Storage > Storage Groups to open the Storage Groups list view.
3. Perform one of the following actions:
   - For all volumes in the storage group: Select the storage group, click , and select Replication QoS to open the Set Replication Priority QoS dialog box.
   - For some volumes in the storage group:
     1. Select a storage group.
     2. Click , and select the number next to Volumes to open the Volumes list view.
     3. Select the volumes, click , and select Set Volumes > Replication QoS.
4. Optional: Select the Show Selected Group Copy Pace checkbox.
5. Select Operation Type from the following valid values:
   - SRDF—Sets the copy pace priority during SRDF operations.
   - Mirror Copy —Sets the copy pace priority during mirror operations.
   - Clone—Sets the copy pace priority during clone operations.
   - VLUN—Sets the copy pace priority during virtual LUN migrations.
6. Select the Copy Pace from the following valid values:
   - 0 -16—Sets the copy pace, with 0 (the default) as the fastest and 16 as the slowest.
   - STOP—Stops the copy. Not supported when the Operation Type is BCV.
   - URGENT—Sets the copy pace to urgent, which may be faster than the default (0). Not supported when the Operation Type is BCV.
7. Click OK.

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