Solved

vSphere 5.5 - Datastore shows 20GB free. Disk in Windows has 800GB free?

Posted on 2016-09-20
6
61 Views
Last Modified: 2016-09-23
I have a datastore that's showing it has 20GB free space out of 1,000 GB provisioned space.
However, only thing on this datastore is a virtual disk connected to a VM.
The disk in a Windows server VM is just a disk that's the 1T disk, and it has 800GB free.

Why would the Windows free space show 800GB, but the datastore in vSphere is 20GB free?
Anyway I can free up the space to reflect?
I'm finding the datastore has insufficient space for a backup.

It is Thick Provision Lazy Zeroed.
0
Comment
Question by:garryshape
  • 2
  • 2
  • 2
6 Comments
 
LVL 13

Accepted Solution

by:
Norm Dickinson earned 250 total points
ID: 41806691
Hmmm...seems to me that If you have provisioned  a 1 TB disk space for a VM, that space is not going to be available as free space. You need to provision a more realistic amount to free up some space, like say 400 GB or so, vs. 1 TB. Then the difference will become available.
0
 

Author Comment

by:garryshape
ID: 41806707
The difference would become available in vSphere? or in Windows?

Windows shows 800GB free for the disk.
vSphere shows 20GB free for the datastore the disk is on.
0
 
LVL 13

Assisted Solution

by:Norm Dickinson
Norm Dickinson earned 250 total points
ID: 41806734
The difference would be available on the host machine.
0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 250 total points
ID: 41806797
When you allocate a virtual machine disk (vmdk) it's allocated and uses all the space immediately on the datastore.

So when you look at the Host OS, you have 20GB free. (which is extremely LOW!), and should be 20-30% left free on the datastore.

Your Windows VM OS, has 800GB free to use.
0
 

Author Comment

by:garryshape
ID: 41806800
Got it, I am sorry. I was forgetting that the disk was the same size of the datastore.

I will just not make it as large as the damn datastore anyways. not sure why so much space was requested in the first place if they're not even using it! story of my life.    

As far as "Veeam" goes which is my backup software. Do you know if I actually exclude this disk from the backup of this VM, will Veeam still make a snapshot and still run the risk of the excluded disk saving files to itself that may fill it up?
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 250 total points
ID: 41806853
All backup software uses the Storage API, and snapshot mechanism to backup VMs.

if you exclude a disk, it should not create a snapshot for it.

and snapshots only fill up datastores, because the backup software has failed to work correctly, but it does happen, and your responsibility as VMware Admin to monitor and check! after backups VMs do not remain on snapshots!
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Backup Exec Failure 3 66
External Hard Drives - Vmware 6.0 5 106
vmware ver 6.5 8 80
Backup and Restore VCenter Linux Appliance methods and scenario best practice ? 4 70
In this article, I will show you HOW TO: Suppress Configuration Issues and Warnings Alert displayed in Summary status for ESXi 6.5 after enabling SSH or ESXi Shell.
In this article, I will show you HOW TO: Create your first Windows Virtual Machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, the Windows OS we will install is Windows Server 2016.
Teach the user how to rename, unmount, delete and upgrade VMFS datastores. Open vSphere Web Client: Rename VMFS and NFS datastores: Upgrade VMFS-3 volume to VMFS-5: Unmount VMFS datastore: Delete a VMFS datastore:
Teach the user how to configure vSphere clusters to support the VMware FT feature Open vSphere Web Client: Verify vSphere HA is enabled: Verify netowrking for vMotion and FT Logging is in place or create it: Turn On FT for a virtual machine: Verify …

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now