Cannot umount lun from host in ESXi

Hi,
I am using ESXi 6.0 cluster with few hosts.
I need to umount/detach datastores related to an old storage that should be removed from datacenter.
Basically I am following this:
https://kb.vmware.com/s/article/2004605

While umounting specific lun from one specific host, I encountered a waring message (like this lun is used somewhere).

I noticed a VM which seems to have references to such datastore:

lun
storage1 lun 9 and storage2 lun 1 are definitely empty.

I suspect this could be related to some previous snapshot, but I am not sure.

How can I "force" the umount in that case?

Thank you!
Armitage318Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You need to make sure it's not in use, if it's not in use, it cannot be unmounted.....

Have you checked Datastore Inventory, to check if any host is still using it, e.g. isos, floppy disks, VMs etc

or object is attached to it. If you have found a VM, Edit the Settings and check if there is any reference to it.... e.g. disk, cdrom iso, floppy disk etc
0
Armitage318Author Commented:
Hi,
I do confirm that such lun is empty. No iso, no floppy, no virtual disk.
If I click on Edit Settings, I don't see any reference to ISO image

luz.jpg
the virtual disk is on storage4 lun6, so it is not on datastore that I need to remove (storage1).
Thank you
0
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
what does Datastore Inventory show any objects attached to the datastore

If you select Unmount, it usually shows a number of green ticks, and then stops.....

what item does it stop on ?
0
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

Luciano PatrãoICT Senior Infraestructure  Engineer  Commented:
Hi,

Do you have any snapshots from those VMs that were inside the Datastore you want to unmount? Because any snapshots that was created on a VM when was running on that Datastore will prevent the Datastore to be unmounted.

Solution is to delete Snapshots.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Hani AlhabshiSystems EngineerCommented:
Do you have data store Snapshots ? if yes remove them
0
Armitage318Author Commented:
Hi Andrew, the first one: "No virtual machine resides on datastore".

Hi Luciano, yes, as I wrote on first post, I do have snapshot. Does issue occours even if snapshot NOT resides on that lun (again, which is totally empty)?
Than you
0
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If there is a reference to the LUN - yes.

What does Datastore Inventory state for that Datastore/LUN ?
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Storage

From novice to tech pro — start learning today.