Solved

Vmware seeing existing LUNs on a SAN via iSCSI

Posted on 2015-02-10
6
278 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 120

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 120

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
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
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 120

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

Comparison of Amazon Drive, Google Drive, OneDrive

What is Best for Backup: Amazon Drive, Google Drive or MS OneDrive? In this free whitepaper we look at their performance, pricing, and platform availability to help you decide which cloud drive is right for your situation. Download and read the results of our testing for free!

Question has a verified solution.

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

If we need to check who deleted a Virtual Machine from our vCenter. Looking this task in logs can be painful and spend lot of time, so the best way to check this is in the vCenter DB. Just connect to vCenter DB(default DB should be VCDB and using…
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 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 …
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…

734 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