vCenter Server warning Storage “File system /storage/log is low on storage space” – Expand disk.

By Lerpong Intaraworrapath | 26th January 2023

In this article, we are planning to upgrade vCenter Server appliance version build number 18455184 (vCenter Server 7.0 Update 2d) to vCenter Server 7.0 Update 3g ( build number 20150588 or higher.

Before upgrading vCenter Server, we must first check its health status by logging onto

User: root
Password: xxxxx

After login to vCenter Server appliance, go to summary and check on the “Health Status”.

We discovered that “Overall Health” displays a yellow alert warning on “Storage“.

Expand “Storage“, we found alert show “File system /storage/log is low on storage space increase the size of disk /storage/log

Go to “Monitor“, then “Disks“, and see which hard disks have alerts.

Hard drive 5 (log) has a utilization rate of more than 80%.

Run “df-h” command to display file system disk space statistics in “human-readable” format.

Return to the vCenter Server web client. There was no snapshot on the vCenter Server appliance.

Right-click vCenter Server and choose “Edit Settings“.

Select Hard disks and expand Hard disk 5.

We will increase the size of hard disk 5 from 25 GB to 30 GB and then click OK.

Log in to the vCenter Server Appliance through SSH.

User: root
Password: xxxx

Run this command to expand any logical volumes whose physical volumes have been increased (


Scripts will scan and expand disk volumes.

Logical volumes had been resized successfully.

Waiting for the procedure to complete.

Run df-h command to display file system disk space statistics in “human-readable” format.

Log in vCenter Server appliance VAMI page.


View the hard drive’s disk space of hard disk 5

The usage rate of hard disk 5 (log) is less than 80%.

The summary page indicates that the health status is good, and you can proceed to upgrade vCenter Server.