OSD

The OSD (Object Storage Daemon) page provides a detailed overview of the storage daemons in your Ceph cluster.
Each OSD represents a logical disk that maps to an underlying physical device such as NVMe, SSD, or HDD.

Statistics Overview

At the top of the page, you will find a dashboard summarizing the state of OSD capacity and availability across the cluster:

Count

The total number of OSDs detected by the cluster.

Usage

The percentage of overall raw storage usage across all OSDs.

Introduction

The OSD page lists all Object Storage Daemons currently available in the cluster. Each row represents one OSD instance and includes the following information:

Column	Description
Name	The unique identifier of the OSD (e.g., osd.0).
State	Indicates the operational status. Up means the daemon is running. In means the OSD is included in the CRUSH map and is storing data.
Exists	Shows whether the OSD physically exists and is recognized by the cluster.
Device Class	The storage device type assigned to the OSD, such as hdd, ssd, or nvme. This information helps determine data placement and CRUSH behavior.
Machine	The hostname of the node hosting the OSD. Selecting the hostname opens the machine detail page.
Placement Group	The number of Placement Groups (PGs) currently assigned to the OSD.
Usage	A visual indicator showing the used and total storage capacity of the OSD (Used Space / Total Space).
IOPS	A real-time chart showing input and output operations per second (Input vs. Output).
Throughput	A real-time chart showing read and write data throughput (Read vs. Write).

Manage OSDs

Each OSD provides an Actions menu for administrative operations.

View SMART

Retrieves S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) information from the physical disk associated with the OSD.
This data helps assess hardware health and identify potential failures.

1. Open the Actions menu for the selected OSD.
2. Click Do S.M.A.R.T.
3. A dialog will appear showing the full S.M.A.R.T. report for the device.