We now need to monitor the upload buffer on the Volume Gateway to confirm that all the data has been uploaded before we create a snapshot.
From the AWS console, click Services, under Storage select Storage Gateway.
On the left panel click Gateways and select your Volume Gateway. The Upload buffer usage will be displayed and it can take up to 5 minutes for this to reach 0% used, you can keep hitting refresh to check.
On the left panel click Volumes and then select the volume you created earlier.
Create EBS snapshot
Enter in the description Clone for EBS Volume and click Create EBS Snapshot.
You should see a green box with a hyperlink to the snapshot, click on the hyperlink snap-xxxxxxx.
You will now see the progress of your snapshot. This may take at least 10 minutes to complete, you can hit refresh to check.
Once completed, click Actions > Create Volume (you could also create an image if this was an iSCSI boot disk to create an AMI) and enter the following details:
Volume Type io1
Size 500 GB
Click Create Volume.
Click on Volumes just above the Snapshots option.
Locate and select the volume we just cloned and click Actions > Attach Volume
Select the EC2 Initiator Instance and it should auto populate the next Device ID, note it down. In this instance it is /dev/sdf . Cick Attach.