NEW - You can now accelerate your migration and modernization with AWS Transform. Read [Getting Started](https://docs.aws.amazon.com/transform/latest/userguide/getting-started.html) in the *AWS Transform User Guide*.

# Change staging disk type


You can change the EBS volume disk type for each disk or for a group of disks.

To change the EBS volume disk type, select the circle to the left of each disk name and choose **Change staging disk type**.

On the **Change staging disk type** dialog, select the type of EBS volume to use for the disk or group of disks.

Select the **AUTO** option if you want AWS Application Migration Service to automatically select the most cost-effective EBS volume disk type for each disk based on the disk size and type based on the option you defined in the** Replication settings** (either the default **Lower cost, Throughput Optimized HDD (st1)** option or the **Faster, General Purpose SSD (gp3)** option).

AWS Application Migration Service uses a single replication server per 15 source disks. Selecting the **AUTO** option ensures that the fewest number of replication servers are used, resulting in increased cost savings. 

**Note**  
AWS Application Migration Service always uses EBS magnetic volumes for disks that are under 500 GiB in size when the **AUTO** option is selected. 

If you do not want AWS Application Migration Service to automatically select a disk, you can select a disk manually. Select the disk type from the**EBS volume type** menu. 

**Note**  
When replicating into an AZ, ensure that the AZ supports the staging disk type chosen. 

For certain disks, you can configure the amount of IOPS to be allocated per GB of disk space under **IOPS**. You can allocate up to 50 IOPS per GB. 64,000 IOPS are available for Nitro-based instances. Other instances are guaranteed up to 32,000 IOPS. The maximum IOPS per instance is 80,000. 

Choose **Change** to confirm the change. 

For **General Purpose SSD (gp3)** disks, you'll also be able to set the **Throughput**. General Purpose SSD (gp3) volumes have a baseline performance of 125 MiB/s. You can provision additional throughput of 0.25 MiB/s per provisioned IOPS up to a maximum of 1,000 MiB/s (at 4,000 IOPS or higher).

Choose **Change** to confirm the change.