Questions and answers regarding this topic can be found under FAQ -> Volumes.

For a detailed description of how to create and mount volumes using the dashboard, see Anleitungen -> Datenträger anlegen.

HeiCLOUD offers block and object storage. Each instance has an ephemeral (existing during the lifetime of the instance) 30 GB block storage root disk. If data needs to be saved persistently and independently of a single instance, separate volumes or the object store must be used. Alternatively, any external data sources (e.g. SDS@hd) can be integrated via the network.

Volumes are similar to hotplug SATA or SAS disks, which can be added or removed dynamically at runtime. A volume can range in size from one GB to several hundred TB.

Currently a single volume cannot be connected to multiple instances at the same time.


The following volume types are currently offered:


# Name IOPS (max) Throughput (max)
1 HDD-Normal 250 90 MiB/s
2 HDD-Performance 500 200 MiB/s
3 SSD-Normal 2.000 250 MiB/s
4 SSD-Performance 10.000 1 GiB/s


The limits for IOPS and throughput are shared by all volumes of a volume type:

  • 1 x 500 GiB SSD-Performance = maximum 10.000 IOPS / 1 GiB/s
  • 5 x 100 GiB SSD-Performance = maximum 10.000 IOPS / 1 GiB/s (Round Robin distribution over all volumes when the limit is reached)


The ephemeral root disks of the instances are excluded from this:

  • 1 x 30 GiB ephemeral root disk (maximum 250 IOPS / 90 MiB/s) +
  • 1 x 100 GiB HDD-Normal (maximum 250 IOPS / 90 MiB/s) =
  • maximum 500 IOPS / 180 MiB/s (each volume individually, no round robin distribution)