On August 27, 2026, maintenance work will take place in the FC-FRA4 data center on power sub-distribution UV-O, which will be migrated to the new low-voltage main distribution (NSHV-B) in the process. This measure is part of the step-by-step modernization of the power supply at the site. In the target state, every dataforest rack will be supplied via NSHV-A and NSHV-B, each equipped with its own UPS and emergency power generator system, which further increases redundancy.
Who is affected:
Some dedicated servers and colocation racks at the FC-FRA4 location are affected. Other locations are not affected.
For servers with redundant power supplies (according to contract / product description), no outage is expected. If these are located in affected racks, only one power feed will drop out. Depending on CPU and load, a lower maximum clock speed is possible.
Servers with only one power supply connected to UV-O will be without power during the maintenance and must be cleanly shut down by you beforehand to prevent data loss and file system damage. We will shut down affected Managed Dedicated Servers.
How to check if your server is affected:
Check the (potentially updated) name of your server in the customer panel or at https://dedicated.dataforest.cloud. If your server carries the suffix "-UV-O", for example "root1234.fc-fra4-UV-O", it is directly affected. Please note that there are also other sub-distribution suffixes that have nothing to do with this maintenance.
Maintenance schedule (CEST):
• Morning: Multi-hour preparation of the new supply line from NSHV-B to UV-O. • 13:00: Scheduled shutdown of UV-O. • 15:00: Power restoration of UV-O and sequential energizing of all rack feeds including functionality check. • 15:30: Expected completion of feed energization. • until approx. 16:00: Buffer for racks with high inrush current (step-by-step "server-by-server" switching on may be required). We will inform you here continuously about affected racks. • 16:00 – 17:00: On-site inspection of servers that did not power on automatically.
You must shut down affected servers yourself prior to 13:00. Otherwise, they will be hard switched off by the power shutdown.
Servers start automatically with our standard BIOS configuration after power supply is restored. Servers that do not switch on automatically will be checked by our technicians independently and immediately. Please do not intervene manually in this process!
The maintenance window serves as a guideline. Work on the power supply is subject to strict safety precautions: Before switching over, the new supply line will be extensively electrically tested (including insulation and impedance measurement, testing of the clockwise rotating field, and phase position control). Personnel safety takes precedence over schedule adherence at all times. We will inform you here about the progress of the work and any deviations.
Additionally, for the duration of the maintenance work, there is no power redundancy for the core switching of rack rows Y and Z. Network operation in rack row X is unaffected by this.
You can assign your server's rack using the switch port statistics. For customer racks, we have no knowledge about the power redundancy of the connected servers. Colocation customers must explicitly connect redundant servers to PDUs of different sub-distribution boards.
How you should prepare:
• Subscribe to this status page for live updates. • Check if your server is connected to "-UV-O". • Plan the shutdown and downtime if necessary. • Inform your users or customers. • If possible, perform a test reboot in advance and check whether all required services start automatically. • Check via IPMI whether "Restore on AC Power Loss -> Power On" is set in the BIOS (dataforest standard). Our support will carry out this check upon request until August 26, 2026. • Check RAID and backups and create a full backup before the maintenance.
If your server is not reachable after the maintenance:
First check this status post. Is the maintenance completed and no problem reported for your rack? Then please check the screen output via IPMI in the control panel and resolve any software problems that prevent starting. If you suspect a hardware defect, contact our support via ticket system.
How dataforest is prepared:
• Top-of-rack switches are redundantly connected to power and network. Even with only one booked uplink, your switch has two power feeds and two core switch uplinks ("double redundancy"). • Our on-site spare parts warehouse is being stocked up to resolve potential defects quickly. • dataforest employees are on site and coordinate the work directly with the service providers. • Redundant power supplies were checked in advance.