Service Specification Volumes (Block Storage)

This English version is provided for convenience only. The German version is legally binding; in the event of any discrepancy between the two versions, the German version shall prevail.

1. Brief description

centron Volumes (“Block Storage”) provides high-performance, persistent NVMe-based storage systems that can be used as disk volumes for virtual machines and as storage for snapshots.

The service enables the permanent storage of data, in particular for applications, databases or stateful workloads. Volumes can be flexibly created, expanded and attached to virtual machines.

2. Key features

centron Volumes offers a powerful block storage platform with the following characteristics:

• provision of persistent NVMe storage for virtual machines (disk volumes)
• use of storage for snapshots and backup purposes
• creation of volumes from operating system images
• creation of volumes from existing snapshots
• permanent storage of data, e.g. application or system data

The NVMe-based architecture enables high performance and low latency for demanding workloads.

3. Service plans

centron Volumes are provided as a uniform service without different availability or performance classes.

Performance is defined exclusively by the storage capacity provided. Volumes can be flexibly resized and scaled to the requirements of the respective application.

4. Metrics

Billing is usage-based per hour or part thereof and per reserved gigabyte for:

• disk volumes
• snapshots

Costs are incurred irrespective of whether a volume is actively attached to a virtual machine.

5. SLA specifics

Availability is defined as the percentage of time during which the data (in particular disk volumes and snapshots) can be accessed.

The monthly availability is:

• 99.9 % as a calendar-month average

Restrictions caused by customer-side configurations or use are not taken into account.

6. Backup

Backup and recovery of volumes and snapshots are not part of the service and lie entirely within the Customer’s responsibility.

The Customer is responsible for planning, performing and reviewing its backup strategies.

7. Additional terms

The creation and restoration of backups lies entirely within the Customer’s area of responsibility.

Volumes constitute block storage and must be configured and managed by the Customer within the operating system of the attached virtual machine, in particular with regard to file systems and access controls.

The Provider accepts no responsibility for data loss or system failures caused by incorrect use, improper configuration or insufficient backup measures on the part of the Customer.

Data on volumes can be exported by the Customer, for example by attaching the volume to a virtual machine and accessing it via operating system functions or corresponding applications.

Metadata and system information can be retrieved via the centron portal or corresponding APIs.