The size of the disk determines the disk type. When you provision a premium disk, the size is rounded up to the next type. For example, if a disk being provisioned is below 128GB, the disk type is P10. However, a disk of 200GB would be P20. The following table highlights the differences:
Type |
P4 |
P6 |
P10 |
P20 |
P30 |
P40 |
P50 |
|
Size |
32 GB |
64 GB |
128 GB |
512 GB |
1 TB |
2 TB |
4 TB |
|
Max IOPs |
120 |
240 |
500 |
2,300 |
5,000 |
7,500 |
7,500 |
|
Throughput (MB/s) |
25 |
50 |
100 |
150 |
200 |
250 |
250 |
Although this table identifies the maximum number of IOPS per disk, stripping multiple data disks can achieve even higher performance.