The Datastore Usage alarm in vCenter Server fails to trigger even when the trigger condition is satisfied

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

• The datastore usage on disk alarm fails to trigger even when the trigger condition is satisfied.
• This appears with the default datastore usage on disk alarm.
• Re-enabling the alarm resolves the issue.

Environment

VMware vCenter Server 7.x
VMware vCenter Server 6.x

Resolution

This is a known issue affecting VMware vCenter Server 6.x and 7.x.

Currently, there is no resolution

Workaround:

To work around this issue, disable and then enable the datastore usage on disk alarm:

To disable and then enable the Datastore usage on disk alarm:

 

Steps:

1. Click Host and Clusters in the Home page.
2. Select the vCenter Server that is having the issue and click the Alarms tab.
3. Click the Definitions tab.
4. Right-click Datastore usage on disk alarm and click Edit.
5. Deselect the Enable this alarm option.
6. Click OK.
7. Right-click Datastore usage on disk alarm and click Edit.
8. Select the Enable this alarm option.

Using vSphere PowerCLI:

To disable and then enable the datastore on disk alarm using vSphere PowerCLI, run this command:

Connect-viserver –Server vCenter_Server

Get-AlarmDefinition -Name 'Datastore usage on disk' | Set-AlarmDefinition -Enabled:$false

Get-AlarmDefinition -Name 'Datastore usage on disk' | Set-AlarmDefinition -Enabled:$true

If disabling and reenabling the alarm does not fix the issue, proceed to restart the VC service.