Solved

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

Posted on 2016-09-20
6
58 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
Do You Know the 4 Main Threat Actor Types?

Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

 
LVL 117

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) 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 117

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) 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

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

It Is not possible to enable LLDP in vSwitch(at least is not supported by VMware), so in this article we will enable this, and also go trough how to enabled CDP and how to get this information in vSwitches and also in vDS.
This is an issue that we can get adding / removing permissions in the vCSA 6.0. We can also have issues searching for users / groups in the AD (using your identify sources). This is how one of the ways to handle this issues and fix it.
Teach the user how to install vSphere Update Manager  Console to Windows system:  Install vSphere Update Manager: Configure vSphere Update Manager plug-in in vSphere Client: Verify vSphere Update Manager settings in vSphere Client:
Teach the user how to install log collectors and how to configure ESXi 5.5 for remote logging Open console session and mount vCenter Server installer: Install vSphere Core Dump Collector: Install vSphere Syslog Collector: Open vSphere Client: Config…

708 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

19 Experts available now in Live!

Get 1:1 Help Now