EBS Volume Types

gp2: General purpose SSD
- 1 GiB ~ 16 TiB
- Can burst to 3000 IOPS for small size volumes
- 3 IOPS per GB, up to 16000 IOPS
gp3: General purpose SSD
- 1 GiB ~ 16 TiB
- Baseline of 3000 IOPS and throughput of 125 MiB/s
- Up to 16000 IOPS and 1000 MiB/s
- Provisioned IOPS and throughput
io1 / io2: High-performance SSD
- 4 GiB ~ 16 TiB
- Up to 64000 Provisioned IOPS for Nitro EC2 instances
- Up to 32000 Provisioned IOPS for other EC2 instances
- io2 have more durability and more IOPS per GiB at the same price as io1 (io2 is always better than io1)
io2 Block Express
- 4 GiB ~ 64 TiB
- Up to 256000 Provisioned IOPS
- Sub-millisecond latency
st1: Throughput optimized HDD
- 125 MiB ~ 16 TiB
- Up to 500 IOPS and 500 MiB/s throughput
sc1: Cold HDD
- 125 MiB ~ 16 TiB
- Up to 250 IOPS and 250 MiB/s throughput

Other key points