Your company owns multiple on-premises Linux servers. You need to configure AWS-backed storage volumes mounted as Internet Small Computer System Interface (iSCSI) devices from on-premises servers. The point-in-time snapshots of the volumes need to be asynchronously saved to AWS. How to achieve the requirement through AWS Storage Gateway?

Answer options:

A.In AWS Storage Gateway, choose the volume gateway type and configure cached volumes to provide low-latency access to the data.
B.In AWS Storage Gateway, choose the Amazon S3 file gateway type and configure iSCSI volumes.
C.In AWS Storage Gateway, select the Amazon FSx file gateway type and configure volumes to provide a full backup of data.
D.In AWS Storage Gateway, select the volume gateway type and create stored volumes.

Correct Answer: D
Option A is incorrect because cached volumes retain a copy of frequently accessed data subsets locally, which is not required in the question.
Option B is incorrect because Amazon S3 File Gateway does not save data in volumes mounted as iSCSI devices.
Option C is incorrect because Amazon FSx file gateway is a file gateway type for Windows file servers instead of Linux servers.
Option D is CORRECT because stored volumes under volume types can be mounted as iSCSI devices, and the snapshots can be saved in AWS asynchronously. Users can create a stored volume in AWS Storage Gateway as follows:
Reference:
https://docs.aws.amazon.com/storagegateway/latest/userguide/WhatIsStorageGateway.html