---
title: "Using disk space in an OpenSearch cluster"
sidebar_label: "Using disk space"
sidebar_position: 8
description: "How disk space is used in an OpenSearch cluster"
---

import Formbricks from '@theme/MDXComponents/Formbricks';

# Using disk space in an OpenSearch cluster

In Managed Databases, part of the disk space is reserved for service needs:

* for the file system — 4% of the disk volume;
* for the operating system, service components, and logs — 8 GB.

The reserved portion of the disk space is not available to host databases. Take this into account when selecting a [configuration lineup](/managed-databases/opensearch/configurations.mdx).

When the cluster disk is 95% full or more, the cluster will enter the `DISK_FULL` status and will operate in read-only mode. This is necessary to prevent a total lock-up or corruption of the cluster due to a lack of free space. To restore read and write operations for the cluster, [scale the cluster](/managed-databases/opensearch/resize-cluster.mdx) and choose a configuration with a larger disk size than the previous one.