Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Vmware seeing existing LUNs on a SAN via iSCSI

Posted on 2015-02-10
6
Medium Priority
?
327 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 123

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 1500 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 123

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 1500 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
The Ideal Solution for Multi-Display Applications

Check out ATEN’s VS1912 12-Port DP Video Wall Media Player at InfoComm 2017. Kerri describes how easy it is to design creative video walls in asymmetric layouts and schedule detailed playlists ahead of time with its advanced scheduling feature.

 
LVL 56

Assisted Solution

by:andyalder
andyalder earned 500 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 123

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 1500 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

Supports up to 4K resolution!

The VS192 2-Port 4K DisplayPort Splitter is perfect for anyone who needs to send one source of DisplayPort high definition video to two or four DisplayPort displays. The VS192 can split and also expand DisplayPort audio/video signal on two or four DisplayPort monitors.

Question has a verified solution.

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

Veeam Backup & Replication has added a new integration – Veeam Backup for Microsoft Office 365.  In this blog, we will discuss how you can benefit from Office 365 email backup with the Veeam’s new product and try to shed some light on the needs and …
In this article, I show you step by step with screenshots to assist you - HOW TO: Deploy and Install the VMware vCenter Server Appliance 6.5 (VCSA 6.5), with some helpful tips along the way.
Teach the user how to configure vSphere Replication and how to protect and recover VMs Open vSphere Web Client: Verify vsphere Replication is enabled: Enable vSphere Replication for a virtual machine: Verify replicated VM is created: Recover replica…
Teach the user how to install and configure the vCenter Orchestrator virtual appliance Open vSphere Web Client: Deploy vCenter Orchestrator virtual appliance OVA file: Verify vCenter Orchestrator virtual appliance boots successfully: Connect to the …

715 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