Virtual SAN: Suppress ‘Datastore Usage on Disk’ Alarm

KB ID 0001527


While deploying a HPE StoreVirtual VSA this week. We noticed all the local Datastore were showing an ‘Alarm’. If you are unfamiliar with Virtual SANs, then you give all the LOCAL Storage to them, which then gets ‘aggregated’ and provided back to the host(s) as fault tolerant clustered storage, like so;

VSA Datastores

Which is great, but the VMware hosts just see that their LOCAL Datastore(s) are full, and they alarm;

Datastore Alarm


Whilst in ‘Datastore View’: Create a ‘Local Datastore Folder‘ and add all you local datastore(s) to that, then create a ‘Virtual Datastore Folder’ and add all your virtual/clustered datastore(s) to that. Select the vCenter > Monitor > Issues > Alarm Definitions > Locate the ‘Datastore usage on disk’ alarm and Edit it. 

Untick: Enable this alarm.

Disable Local Storage Alarm

You will recreate this alarm again below, so take a note all ALL its settings;

Datastore Usage Alarm Settings

Now select your Virtual Datastore folder > Monitor > Issues > Alarm Definitions > Add > Recreate the alarm again, Note: I’ve called it ‘Virtual-Datastore-Usage-On-Disk‘.

Virtual Datastore Alarm

Have a coffee, refresh the page, the alarms should have gone.

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Author: PeteLong

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