# AWS DRS disk settings
Disk settings

The **Disk settings** tab shows a list of all of the disks on the source server and information for each disk:
+ **Disk name**
+ **Staging disk type** – The corresponding Amazon EBS volume disk type that is being used for the disk.
+ **Replicated storage** – The amount of storage that has been replicated from the disk to the Replication Server.
+ **Total storage** – The total storage capacity of the disk.
+  **Status** – shows the status of each disk, values can be either **Normal**, **Normal with marketplace license**, **Error** (with error description). Normal with marketplace license means that the server has at least one marketplace license associated with this volume. Volumes with marketplace licenses pose some limitations on launch: the target region and the selected instance type must support this license. If launching into a different account, the marketplace product must be subscribed to in that account as well or the launch fails. The state is set to Error if there is a problem with the volume, such as not having permissions to read the marketplace license details if the server is owned by a different AWS account. The value can also be empty if the status is not known at this time. 

## 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:

1. Select the circle to the left of each disk name and choose **Change staging disk type**.

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

1. Select the **AUTO** option if your volume's size is greater than 125 GiB and you want AWS Elastic Disaster Recovery 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 (gp2) or (gp3)** s option).

AWS Elastic Disaster Recovery 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 Elastic Disaster Recovery always uses EBS magnetic volumes for disks that are under 125 GiB in size when you choose the **Auto** option.

If you do not want AWS Elastic Disaster Recovery to automatically select a disk, you can select a disk manually. Select the disk type from the **EBS volume type** menu.

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.