Triggered datastore alarm does not get cleared
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Triggered datastore alarm does not get cleared


Article ID: 308808


Updated On:


VMware vCenter Server


  • The datastore alarm does not get cleared after selecting Acknowledge Alarm in the vSphere Client connection to vCenter Server.
  • The alarm is greyed out.


VMware vCenter Server 5.0.x
VMware vCenter Server 4.1.x
VMware vCenter Server 4.0.x


This issue occurs when the datastore has reached the warning or critical alarm events that are configured in vCenter Server.

Note: This alarm is state-based and it cannot be cleared until the underlying state causing the alarm is resolved.
To clear these warning and critical alarms, try one of these options:

  • Acknowledge the alarm by Right clicking on the alarm.
  • If acknowledging the alarm gets grayed out, but alarm is still not removed, try to disable/ enable the alarm
  • Increase the datastore size.
  • Free up enough space on the datastore, so that it is within the alarm's configured threshold.
  • Increase the threshold on the datastore alarm.
After performing one of these options, initiate a rescan of the hosts/clusters VMFS volumes and HBAs.

Additional Information

You can refer vSphere Datacenter Administration Guide Working with Alarms section for vSphere 4.1.
For more information on vSphere 5, see the Monitoring Events, Alarms, and Automated Actions section of vSphere Monitoring and Performance Guide.