Maximum Disk Size:
Check this option and provide a Disk Password to encrypt the contents of the EBS disk to ensure its contents cannot be accessed, except via this EBS Disk.
General Purpose (SSD):
General Purpose SDD (gp2) volumes offer cost-effective storage that is ideal for a broad range of workloads. These volumes deliver single-digit millisecond latencies, the ability to burst to 3,000 IOPS for extended periods of time, and a base performance of 3 IOPS/GiB. General Purpose (SSD) volumes can range in size from 1 GiB to 1 TiB.
General Purpose SSD (gp3) volumes can be added from the Amazon Web Services EC2 Console. For additional information on how to do this, please refer to Creating a gp3 Volume on AWS for additional information. Once the gp3 volume(s) are added, they can be incorporated into Storage Pools and Volumes for use with SMB/CIFS, NFS, and even iSCSI.
Provisioned IOPS (SSD):
Provisioned IOPS (SSD) volumes are designed to meet the needs of I/O-intensive workloads, particularly database workloads, that are sensitive to storage performance and consistency in random access I/O throughput. Specify an IOPS rate (using the dropdown provided when the option is selected) when the volume is created, and Amazon EBS delivers within 10 percent of the provisioned IOPS performance 99.9 percent of the time over a given year.
Magnetic volumes provide the lowest cost per gigabyte of all Amazon EBS volume types. Magnetic volumes are backed by magnetic drives and are ideal for workloads performing sequential reads, workloads where data is accessed infrequently, and scenarios where the lowest storage cost is important. These volumes deliver approximately 100 IOPS on average, with burst capability of up to hundreds of IOPS, and they can range in size from 1 GiB to 1 TiB. Magnetic volumes can be striped together in a RAID configuration for larger size and greater performance.