1. Ceph Block Storage Concepts
When your instance needs additional storage (e.g., for Nextcloud libraries, database archives, or media assets), Netcup provides enterprise Ceph NVMe Local Block Storage volumes. They attach dynamically to running instances with redundant high-availability.
2. Disk Partition & /etc/fstab
Once attached in the CCP dashboard, partition, format, and automount the new block device in Linux:
# 1. Identify newly attached disk (typically /dev/vdb)
lsblk
# 2. Format as ext4 filesystem
sudo mkfs.ext4 -F /dev/vdb
# 3. Create mount point and test mount
sudo mkdir -p /mnt/data
sudo mount /dev/vdb /mnt/data
# 4. Get disk UUID and add to /etc/fstab for persistent mount
sudo blkid /dev/vdb
echo "UUID=YOUR_DISK_UUID /mnt/data ext4 defaults,nofail 0 2" | sudo tee -a /etc/fstab
Adding "nofail" to /etc/fstab ensures the server boots reliably even if the volume is temporarily detached.
3. SCP Snapshots & Rollback
Before conducting OS upgrades or risky configuration changes, capture an instant hardware-level snapshot in SCP:
- Access the SCP dashboard (servercontrolpanel.de) and select your instance.
- Navigate to the "Snapshots" tab in the left navigation.
- Click "Create snapshot". The copy-on-write image generates within seconds.
- If issues arise, click "Restore" to rollback your entire instance instantly.
4. Storage FAQ
Q: Can block storage be attached to multiple servers simultaneously?
A: No. Block storage is a raw block device mapped to a single instance at a time. For shared multi-instance access, run NFS or Samba.
Markus S.
Senior Cloud Infrastructure Architect & Linux Sysadmin
Markus focuses on European cloud hosting economics, server performance optimization, and KVM virtualization. All benchmarks, setup guides, and VAT exemption procedures are verified on self-funded Netcup instances hosted in the Nuremberg datacenter (AMD EPYC hardware).
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