Block Storage FAQ
IONOS systems are built on Kernel-based Virtual Machine (KVM) hypervisor and libvirt virtualization management. We have adapted both of these components to our requirements and optimized them for the delivery of diverse cloud services, with a special focus on security and guest isolation.
Some software images are only designed for certain virtualization systems. Without VirtlO drivers, VM will not work properly with the hypervisor. You can set the storage bus type to IDE temporarily to install the VirtlO drivers.
For a Windows VM to work properly with our hypervisor, VirtI/O drivers are required.
- Install Windows using the original IDE driverYou can now install the VirtIO drivers from the ISO provided by IONOS.
- Add a CD-ROM drive to your server
- Select the windows-virtio-driver.iso ISO
- Boot from the selected ISO to start the automatic installation toolYou can now switch to VirtIO.
Our hypervisor informs the guest operating system that it is located in a virtualized environment. Some virtualized systems do not support virtualized environments and cannot be executed on an IONOS virtual server. We generally do not recommend using your own virtualization technology in virtual hosts.
You can upload your own images to the FTP server in your region. The available regions are:
Frankfurt am Main (DE):
Las Vegas (US):
Your own images are only available in the region where you uploaded them. Accordingly, only images located in the same region as the virtual data center are available for selection in a virtual data center. For example, if you upload an image to the FTP server in Frankfurt, you can only use that image in a virtual data center in Frankfurt.
We strongly recommend that you select FTPS (File Transfer Protocol with Transport Layer Security) as the transfer protocol. This can easily be done using "FileZilla", for example. Simple FTP works as well, but your access data is transmitted in plain text.
After a file has been uploaded to the FTP server, it is protected from deletion, converted, and then made available as an image. When this process is finished, the file size is reduced to 0 bytes to save space but left on the FTP server. This is to prevent a file with the same name from being uploaded again and interfering with the processing of existing images. If an image is no longer needed, please contact the IONOS enterprise support team.
Snapshots that you no longer need can be deleted in the Image Manager.
Live Vertical Scaling is supported by all our images. Please note that the Windows OS only allows CPU core scaling.
It is not possible to connect multiple servers to one storage device, but you can connect multiple servers in a network without performance loss.
IONOS Cloud allows the customer to upload their own images to the infrastructure via upload servers. This procedure is to be completed individually for each data center location. IONOS Cloud optionally offers transmission with secure transport (TLS). The uploading of HDD and CD-ROM/DVD-ROM images is supported. Specifically, the uploading of images in the following formats is supported:
CD-ROM / DVD-ROM:
- *.iso ISO 9660 image file
- *.vmdk vmware HDD images
- *.vhd, *.vhdx HyperV HDD images
- *.cow, *.qcow, *.qcow2 Qemu HDD images
- *.raw binary HDD image
- *.vpc VirtualPC HDD image
- *.vdi VirtualBox HDD image
Once a storage device is provisioned, it is not possible to change its Availability Zone. You could, however, create a snapshot and then use it to provision a storage device with a new Availability Zone.