Limitations

The following are a few limitations that you can encounter while using Block Storage:

• We guarantee operation for the selected operating systems until the vendor or upstream support is available.

• Microsoft Windows Server versions are also supported until vendor support is available. For more information, see Prerequisites.

• The following volume minimum and maximum values apply based on the storage type.

Storage Volume	HDD Storage	SSD Premium	SSD Standard
Minimum size per volume	1 GB	1 GB	1 GB
Maximum size per volume	4 TB	4 TB	4 TB
Maximum Read/write speed, sequential	-	600 Mb/s per volume at 1 MB block size	300 Mb/s per volume at 1 MB block size
Maximum Read speed, full random	-	45,000 IOPS at 4 KB block size and minimum 4 Cores, 4 GB RAM per volume	24,000 IOPS at 4 KB block size and minimum 2 Cores, 2 GB RAM per volume
Maximum Write speed, full random	-	30,000 IOPS at 4 KB block size and minimum 4 Cores, 4 GB RAM per volume	18,000 IOPS at 4 KB block size and minimum 2 Cores, 2 GB RAM per volume

Larger volumes can be made available on request. For more information, contact IONOS Cloud Support.