Welcome!

Machine Learning Authors: Liz McMillan, Pat Romanski, Yeshim Deniz, Jason Bloomberg, Rajeev Kozhikkattuthodi

Related Topics: Microsoft Cloud, Open Source Cloud, Containers Expo Blog, Machine Learning , Silverlight, Release Management

Microsoft Cloud: Article

Step-by-Step: Speaking iSCSI with Windows Server 2012 and Hyper-V

Built-in support for iSCSI and MPIO provide an easy path for connecting Hyper-V hosts to existing SAN storage

Windows Server 2012 and our completely free Hyper-V Server 2012 certainly have some really cost-effective new storage options, with Storage Spaces and Hyper-V over SMB 3.0.  However, many IT Pros have already invested in iSCSI shared storage and, as a result, many Hyper-V deployments also need to be able to leverage these existing storage investments.

iSCSI? No problem! Windows Server 2012 and Hyper-V Server 2012 include native support for a software iSCSI initiator as well as MPIO ( Multipath IO ) for  resiliency and load balancing of storage IO over multiple network paths.

In this article, we’ll walk through the process of connecting Windows Server 2012 and Hyper-V Server 2012 to common iSCSI storage arrays.  Because most of my IT Pro friends are running Hyper-V either on Windows Server 2012 Server Core or Hyper-V Server 2012, both options without a local console GUI, I’ll be providing my examples below in PowerShell.

NOTE: In this article, I make the assumption that your iSCSI storage array is already configured and that your Hyper-V host is already physically attached and zoned into your iSCSI storage network.

  • Don’t have an iSCSI Storage Array? Did you know that Windows Server 2012 includes an iSCSI Target role that, along with Failover Clustering, allows it to become a cost-effective and highly-available iSCSI Storage Array?  Walk through the process of getting this configured in the following Step-by-Step Guide:

    DO IT: Step-by-Step: Build a Windows Server 2012 Storage Server

Let’s Get Things “Started” …
A software iSCSI initiator is installed by default on Windows Server 2012 and Hyper-V Server 2012 as the MSiSCSI service.  However, the MSiSCSI service isn't set to automatically startup, so we can start the MSiSCSI service with the following PowerShell command lines:

Set-Service –Name MSiSCSI –StartupType Automatic

Start-Service MSiSCSI

After running the above cmdlets, you can check on the status of the MSiSCSI service with the following command line:

Get-Service –Name MSiSCSI

Now Let’s Get “Connected’ …
After starting the MSiSCSI service, we can connect from our Hyper-V host to the iSCSI target on the storage array with the following PowerShell command line:

New-IscsiTargetPortal –TargetPortalAddress <IP_Address or FQDN of storage array>

$target = Get-IscsiTarget

Connect-IscsiTarget –NodeAddress $target.NodeAddress

If you’re successfully connected to the target on your iSCSI storage array, you should see the connection status returned with the following cmdlet:

Get-IscsiConnection

Now, let’s make the session for this iSCSI connection persist across reboots with the following command:

Get-IscsiSession | Register-IscsiSession

You can check to make sure the IsPersistent value is True for this session with the following command line:

Get-IscsiSession

We’re ready to start using our new iSCSI disk!
After successfully persisting our connection to the iSCSI target session, we’re ready to begin using our new iSCSI disk.  To verify that your Hyper-V host sees the new iSCSI disk, use the following command:

Get-Disk | Where-Object BusType –eq “iSCSI”

Note the disk Number in the first column and verify that the Partition Style column shows “Raw” ( ie. unused ) for this new disk.  To initialize and format the new disk, use the following command line, being careful to specify the correct disk number from the command output above:

Initialize-Disk –Number <Disk_Number> –PartitionStyle GPT –PassThru | New-Partition –AssignDriveLetter –UseMaximumSize | Format-Volume

After this command completes, you can use the following command to confirm the drive letter assigned to the new partition on your iSCSI disk so that you can begin using this path for storing new virtual machines and virtual hard disks!

Get-Partition

Great! But … What about High Availability?
Good question! Highly available iSCSI connections are generally configured via MPIO ( Multipath IO ).  MPIO support is also included in Windows Server 2012 and Hyper-V Server 2012, but this feature first needs to be installed with the following command line:

Install-WindowsFeature Multipath-IO

After MPIO is installed, configure it to automatically claim all iSCSI devices for MPIO with the following command lines:

Enable-MSDSMAutomaticClaim –BusType iSCSI

Set-MPIOSetting –NewDiskTimeout 60

After running these commands, restart your server for MPIO discovery to take effect.  After restarting, you can also configure a Round Robin load-balancing policy for all newly claimed devices with the following command:

Set-MSDSMGlobalDefaultLoadBalancePolicy -Policy RR

NOTE: The above commands leverage the Microsoft MPIO DSM ( Device Specific Module ).  Prior to attempting to implement MPIO between your hosts and storage array, be sure to check with your storage array vendor to confirm their compatibility with this DSM.  In some cases, your storage vendor may require an alternate DSM and/or a different MPIO configuration. Many storage arrays that are SPC-3 compliant will work with the Microsoft DSM, but we recommend confirming compatibility with your storage vendor before proceeding.

Want More? Become a Virtualization Expert in 20 Days!
This month, my fellow Technical Evangelists and I are writing a new blog article series, titled Become a Virtualization Expert in 20 Days! Each day we’ll be releasing a new article that focuses on a different area of virtualization as it relates to compute, storage and/or networking.  Be sure to catch the whole series at:

After you’re done reading the series, if you’d like to learn more and begin preparing for MCSA certification on Windows Server 2012, join our FREE Windows Server 2012 “Early Experts” online study group for IT Pros at:

Build Your Lab! Build Your Lab! Download Windows Server 2012
Build Your Lab in the Cloud! Don’t Have a Lab? Build Your Lab in the Cloud with Windows Azure Virtual Machines
Join our "Early Experts" study group! Want to Get Certified? Join our Windows Server 2012 "Early Experts" Study Group

More Stories By Keith Mayer

Keith Mayer is a Technical Evangelist at Microsoft focused on Windows Infrastructure, Data Center Virtualization, Systems Management and Private Cloud. Keith has over 17 years of experience as a technical leader of complex IT projects, in diverse roles, such as Network Engineer, IT Manager, Technical Instructor and Consultant. He has consulted and trained thousands of IT professionals worldwide on the design and implementation of enterprise technology solutions.

Keith is currently certified on several Microsoft technologies, including System Center, Hyper-V, Windows, Windows Server, SharePoint and Exchange. He also holds other industry certifications from IBM, Cisco, Citrix, HP, CheckPoint, CompTIA and Interwoven.

Keith is the author of the IT Pros ROCK! Blog on Microsoft TechNet, voted as one of the Top 50 "Must Read" IT Blogs.

Keith also manages the Windows Server 2012 "Early Experts" Challenge - a FREE online study group for IT Pros interested in studying and preparing for certification on Windows Server 2012. Join us and become the next "Early Expert"!

@CloudExpo Stories
Artificial intelligence, machine learning, neural networks. We’re in the midst of a wave of excitement around AI such as hasn’t been seen for a few decades. But those previous periods of inflated expectations led to troughs of disappointment. Will this time be different? Most likely. Applications of AI such as predictive analytics are already decreasing costs and improving reliability of industrial machinery. Furthermore, the funding and research going into AI now comes from a wide range of com...
When growing capacity and power in the data center, the architectural trade-offs between server scale-up vs. scale-out continue to be debated. Both approaches are valid: scale-out adds multiple, smaller servers running in a distributed computing model, while scale-up adds fewer, more powerful servers that are capable of running larger workloads. It’s worth noting that there are additional, unique advantages that scale-up architectures offer. One big advantage is large memory and compute capacity...
The financial services market is one of the most data-driven industries in the world, yet it’s bogged down by legacy CPU technologies that simply can’t keep up with the task of querying and visualizing billions of records. In his session at 20th Cloud Expo, Karthik Lalithraj, a Principal Solutions Architect at Kinetica, discussed how the advent of advanced in-database analytics on the GPU makes it possible to run sophisticated data science workloads on the same database that is housing the rich...
"When we talk about cloud without compromise what we're talking about is that when people think about 'I need the flexibility of the cloud' - it's the ability to create applications and run them in a cloud environment that's far more flexible,” explained Matthew Finnie, CTO of Interoute, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
Amazon started as an online bookseller 20 years ago. Since then, it has evolved into a technology juggernaut that has disrupted multiple markets and industries and touches many aspects of our lives. It is a relentless technology and business model innovator driving disruption throughout numerous ecosystems. Amazon’s AWS revenues alone are approaching $16B a year making it one of the largest IT companies in the world. With dominant offerings in Cloud, IoT, eCommerce, Big Data, AI, Digital Assista...
In his session at Cloud Expo, Alan Winters, an entertainment executive/TV producer turned serial entrepreneur, presented a success story of an entrepreneur who has both suffered through and benefited from offshore development across multiple businesses: The smart choice, or how to select the right offshore development partner Warning signs, or how to minimize chances of making the wrong choice Collaboration, or how to establish the most effective work processes Budget control, or how to ma...
SYS-CON Events announced today that Cloud Academy named "Bronze Sponsor" of 21st International Cloud Expo which will take place October 31 - November 2, 2017 at the Santa Clara Convention Center in Santa Clara, CA. Cloud Academy is the industry’s most innovative, vendor-neutral cloud technology training platform. Cloud Academy provides continuous learning solutions for individuals and enterprise teams for Amazon Web Services, Microsoft Azure, Google Cloud Platform, and the most popular cloud com...
No hype cycles or predictions of zillions of things here. IoT is big. You get it. You know your business and have great ideas for a business transformation strategy. What comes next? Time to make it happen. In his session at @ThingsExpo, Jay Mason, Associate Partner at M&S Consulting, presented a step-by-step plan to develop your technology implementation strategy. He discussed the evaluation of communication standards and IoT messaging protocols, data analytics considerations, edge-to-cloud tec...
What's the role of an IT self-service portal when you get to continuous delivery and Infrastructure as Code? This general session showed how to create the continuous delivery culture and eight accelerators for leading the change. Don Demcsak is a DevOps and Cloud Native Modernization Principal for Dell EMC based out of New Jersey. He is a former, long time, Microsoft Most Valuable Professional, specializing in building and architecting Application Delivery Pipelines for hybrid legacy, and cloud ...
DevOps at Cloud Expo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to w...
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
You know you need the cloud, but you’re hesitant to simply dump everything at Amazon since you know that not all workloads are suitable for cloud. You know that you want the kind of ease of use and scalability that you get with public cloud, but your applications are architected in a way that makes the public cloud a non-starter. You’re looking at private cloud solutions based on hyperconverged infrastructure, but you’re concerned with the limits inherent in those technologies.
Both SaaS vendors and SaaS buyers are going “all-in” to hyperscale IaaS platforms such as AWS, which is disrupting the SaaS value proposition. Why should the enterprise SaaS consumer pay for the SaaS service if their data is resident in adjacent AWS S3 buckets? If both SaaS sellers and buyers are using the same cloud tools, automation and pay-per-transaction model offered by IaaS platforms, then why not host the “shrink-wrapped” software in the customers’ cloud? Further, serverless computing, cl...
Internet of @ThingsExpo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devic...
A look across the tech landscape at the disruptive technologies that are increasing in prominence and speculate as to which will be most impactful for communications – namely, AI and Cloud Computing. In his session at 20th Cloud Expo, Curtis Peterson, VP of Operations at RingCentral, highlighted the current challenges of these transformative technologies and shared strategies for preparing your organization for these changes. This “view from the top” outlined the latest trends and developments i...
We build IoT infrastructure products - when you have to integrate different devices, different systems and cloud you have to build an application to do that but we eliminate the need to build an application. Our products can integrate any device, any system, any cloud regardless of protocol," explained Peter Jung, Chief Product Officer at Pulzze Systems, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA
SYS-CON Events announced today that Enzu will exhibit at SYS-CON's 21st Int\ernational Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Enzu’s mission is to be the leading provider of enterprise cloud solutions worldwide. Enzu enables online businesses to use its IT infrastructure to their competitive advantage. By offering a suite of proven hosting and management services, Enzu wants companies to focus on the core of their ...
@DevOpsSummit at Cloud Expo taking place Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center, Santa Clara, CA, is co-located with the 21st International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world.
21st International Cloud Expo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Me...