Solved

Windows 2012 R2, Storage Server, iSCSI, VHDX, Hyper-V Cluster.

Posted on 2016-09-27
4
56 Views
Last Modified: 2016-09-27
Hey Guys

I recently setup a new storage server (WIndows 2012 R2, iSCSI and 2x Hyper-V Hosts. I have a question about "VHDX Drives" presented to a VM host, and then creating a VM (which uses vhdx) onto the presented "VHDX drive". I put this post on technet but no luck. (Bottom of page) - that is nested VHDX's.  


So here is what I have created:

1) Several LUNs created as "Diskname.vhdx"
2) Those LUNs are then presented to both my VMhosts
3) I created a Hyper-V Failover Cluster (2 VM hosts)
4) Then I presented my newly provisioned LUNs out and started setting up VMs.

Here is my question though, since an iSCSI "Drive" is basically just a VHDX file, and since VMs are basically stored on VHDX files.
Am I not creating a VHDX within a VHDX? Is that right way to do this? I realize my question may sound stupid, but in the past I simply created a VHD file on standard HDD. Now I am basically nesting vhdx's. ?

Thanks,
Robert

here is the technet link: https://social.technet.microsoft.com/Forums/windowsserver/en-US/cd5be36f-3683-48aa-9361-40dc7480ef31/windows-2012-r2-hyperv-shared-csv-iscsi-and-sata?forum=winserverClustering#fde82eee-5cd3-4c8a-bf3a-52f56a1a3de3
0
Comment
Question by:castellansolutions
  • 2
  • 2
4 Comments
 
LVL 56

Expert Comment

by:Cliff Galiher
ID: 41818900
Yes, that is exactly what you are doing, and yes that is the right way to do it. The VHDX format was designed and envisioned with this as one of the use cases and results, and is very efficient at nesting, unlike the old VHD format. No worries. Onward.
0
 
LVL 6

Author Comment

by:castellansolutions
ID: 41818941
ok so its ok to do it with VHDX files, but not with VHD files? And, is there a way to get Windows 2012R2 to "Present" the Storage without it creating an iSCSI VHDX file? Similar to real SAN which would not present a VHDX ?

Thanks,

Robert
0
 
LVL 56

Accepted Solution

by:
Cliff Galiher earned 500 total points
ID: 41818950
It is "okay" to do it with vhd files as well, but is not very efficient and there is a performance hit. VHDX doesn't have those significant hurdles.

And no, the iSCSI target in windows relies on storage virtualization. Although to be accurate, the VHDX isn't "presented" at all. A logical drive is presented to the iSCSI initiator. The initiator doesn't know or care that the underlying storage is a VHDX file. That is self contained on the iSCSI target. And "real" SANs use similar tricks, albeit not with the VHDX format specifically. But if you dig into a SAN, most run a variant of links and aggregate their storage with a proprietary file format. Similar in function to VHDX. Don't get hung up just because windows lets you peak behind the curtain more than brand X's black box.
0
 
LVL 6

Author Comment

by:castellansolutions
ID: 41819006
Thanks Cliff. I am just having a hard time wrapping head around the "VHDX inside a  VHDX". I have used virtualization for many years, but only on a small scale. 2 or VM hosts with 5 or 6 VMs on each. Now i am doing it the right way.

Thanks for the confirmation.

Robert
0

Featured Post

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.

Question has a verified solution.

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

The recent Microsoft changes on update philosophy for Windows pre-10 and their impact on existing WSUS implementations.
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 …
This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…

910 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

23 Experts available now in Live!

Get 1:1 Help Now