Solved

Vmware seeing existing LUNs on a SAN via iSCSI

Posted on 2015-02-10
6
243 Views
Last Modified: 2016-11-23
Here is the situation.  I have a client that has a Dell NAS with 2 LUNS created on the NAS.  Physical Disk 'A' can see LUN 1 and Physical Disk 'B' can see LUN 2.  Both Physical servers are connected to the NAS via iSCSI.

They have recently implemented a VMWare server and we are trying to connect the VMWare server to the NAS via iSCSI.  It sees the NAS, but keeps saying "no devices".  I have attached a screenshot of the VMware configuration.

What step am I missing?
Vmware-connection-to-existing-SAN-LUNs.J
0
Comment
Question by:KPI1
  • 3
  • 2
6 Comments
 
LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 375 total points
ID: 40601508
Both Physical servers are connected to the NAS via iSCSI.

What are these servers ? ESXi Hosts ?

Have you added the iSCSI Software IQN to the permissions or ACLs of the LUNs, but before you do this....

are all these servers ESXi hosts?

You cannot have Windows and ESXi hosts access the same LUN
0
 

Author Comment

by:KPI1
ID: 40601871
The current "physical" servers I refer to are a Standalone Windows 2003 server (Server A) and a Standalone Windows 2008 server (Server B).  These are Dell servers and so is the SAN.

I didn't think Windows servers and ESXi servers could see the same LUN, but my Dell server person said it's possible.  The idea is not to have the Windows server share the LUN with ESXi.  ESXi would only access it if the Windows server failed.
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 375 total points
ID: 40601900
So you have two servers (2003) and (2008). access the same LUNs ? - if so this will cause file system corruption.

I didn't think Windows servers and ESXi servers could see the same LUN, but my Dell server person said it's possible.

Dell server person is talking rubbish! - Not possible, and will cause corruption, Windows cannot read VMware VMFS, and VMware ESXi cannot read NTFS!

ESXi would only access it if the Windows server failed.

Sorry, not going to work.

You would need to have a Windows VM.
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 
LVL 55

Assisted Solution

by:andyalder
andyalder earned 125 total points
ID: 40602161
>Physical Disk 'A' can see LUN 1 and Physical Disk 'B' can see LUN 2.

Do you mean Physical Windows Server 'A' etc.? IF so them each server sees a different LUN which is fine. It's also possible for a VM to have one of these LUNs presented to it by configuring the SAN so that the VMware server has access to it and configuring VMware to pass the LUN to the OS using RDM. Just make sure the physical windows server and VM do not have access at the same time by only having one of them running.
0
 

Author Comment

by:KPI1
ID: 40602229
Yes, I mean Physical server 'A' (Windows 2003 server) can access LUN 1 on the SAN.  It can not see LUN2 on the SAN.  Physical server 'B' (Windows 2008 server) can access LUN2 but can't see LUN 1 on the SAN.

When you say,
 "It's also possible for a VM to have one of these LUNs presented to it by configuring the SAN so that the VMware server has access to it and configuring VMware to pass the LUN to the OS using RDM. Just make sure the physical windows server and VM do not have access at the same time by only having one of them running.".

That's exactly what I am trying to do.  Can you point me to more documentation on configuring VMWare to pass the LUN to the OS using RDM?

Thank you.



Can you point
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 375 total points
ID: 40602613
If you want to do RDM, then see here:-

https://www.vmadmin.co.uk/resources/35-esxserver/58-rdmvm
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

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

Exchange server is not supported in any cloud-hosted platform (other than Azure with Azure Premium Storage).
Last article we focus in how to VMware: How to create and use VMs TAGs – Part 1 so before follow this article and perform the next tasks, you should read the first article how to create the TAG before using them in Veeam Backup Jobs.
Teach the user how to edit .vmx files to add advanced configuration options Open vSphere Web Client: Edit Settings for a VM: Choose VM Options -> Advanced: Add Configuration Parameters:
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…

828 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