SSD component raises your VPS or Container I/O and IOPS limit.
For Linux, Windows, and Container VPS, the SSD component raises I/O and IOPS 5 times to 250 MB/s and 1000 IOPS.
Storage VPS can’t have SSD components.
You can read more about IOPS and IO here.
Unfortunately, you cannot order SSD component for managed Linux service.