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vSAN Datastore usage on disk warning

cargex asked
Last Modified: 2017-03-31
Hi Guys,
I have a VMware cluster (3 ESXi Servers) and a vSAN configured using all the storage among these servers.

When I go to the vSAN Datastore summary usging the vSphere client it shows 8TB of free space.

But 2 events are happening that got me worried:

Event 1.
When I tried to extend a virtual hard disk in a VM the following error message happened: "The disk extend operation failed: msg.disklib.NOSPACE"

Event 2.
In the vSAN Datastore Alarms tab I have the message: "warning: Datastore usage on disk"

My Questions:

Why are these events popping up if according to the system I still have 8TB of free space?

How can I fix this issue?, preferable keeping all the space I have reserved for Virtual Disks on my VMs.

Thanking you in advance,
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