Disk partitioning in a Managed Kubernetes cluster on dedicated servers

In a Managed Kubernetes cluster, only one disk type is automatically allocated on dedicated servers — the highest performing disk. Disk types in order from the highest performing to the lowest performing: NVMe SSD ⟶ SATA SSD ⟶ SATA HDD.

The disks in the cluster are RAID1 — all data is simultaneously written to the two physical disks in the RAID array.Both disks in the array are partitioned.

By default, the following partitions are allocated: root /, /boot and /storage.

You can change disk partitioning only when creating a cluster.You can discard the /storage partition and resize the root partition /.For a list of partitions and information about their default size and value limits, see the Disk Partitions and Size table.

In an existing cluster, you can view the disk partitioning in the control panel: in the top menu, click Products and select Managed Kubernetes → cluster page → Cluster Composition tab → click on the node name → Operating System tab → Partitioning field.

Disk partitions and their size

	Default size	Minimum size	Maximum size
/	100 GB.	30 GB.	Calculated using the formula: disk size (in GB) — 1 GB of `/boot` partition — 1 GB of `/storage` partition
/boot	1 GB*	1 GB	1 GB
/storage	Calculated using the formula: disk size (in GB) — 1 GB of `/boot` partition — 100 GB of `/storage` partition	1 GB	Calculated by the formula: disk size (in GB) — size of root partition `/` — 1 GB of `/boot` partition

* Partition size /boot cannot be changed.