Welcome!

Machine Learning Authors: Dana Gardner, Peter Silva, Jyoti Bansal, Carmen Gonzalez, Jason Bloomberg

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
Every successful software product evolves from an idea to an enterprise system. Notably, the same way is passed by the product owner's company. In his session at 20th Cloud Expo, Oleg Lola, CEO of MobiDev, will provide a generalized overview of the evolution of a software product, the product owner, the needs that arise at various stages of this process, and the value brought by a software development partner to the product owner as a response to these needs.
SYS-CON Events announced today that Enzu will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY, and the 21st International 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 ad...
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, introduced the technologies required for implementing these idea...
Enterprise networks are complex. Moreover, they were designed and deployed to meet a specific set of business requirements at a specific point in time. But, the adoption of cloud services, new business applications and intensifying security policies, among other factors, require IT organizations to continuously deploy configuration changes. Therefore, enterprises are looking for better ways to automate the management of their networks while still leveraging existing capabilities, optimizing perf...
Using new techniques of information modeling, indexing, and processing, new cloud-based systems can support cloud-based workloads previously not possible for high-throughput insurance, banking, and case-based applications. In his session at 18th Cloud Expo, John Newton, CTO, Founder and Chairman of Alfresco, described how to scale cloud-based content management repositories to store, manage, and retrieve billions of documents and related information with fast and linear scalability. He addres...
The WebRTC Summit New York, to be held June 6-8, 2017, at the Javits Center in New York City, NY, announces that its Call for Papers is now open. Topics include all aspects of improving IT delivery by eliminating waste through automated business models leveraging cloud technologies. WebRTC Summit is co-located with 20th International Cloud Expo and @ThingsExpo. WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web co...
While not quite mainstream yet, WebRTC is starting to gain ground with Carriers, Enterprises and Independent Software Vendors (ISV’s) alike. WebRTC makes it easy for developers to add audio and video communications into their applications by using Web browsers as their platform. But like any market, every customer engagement has unique requirements, as well as constraints. And of course, one size does not fit all. In her session at WebRTC Summit, Dr. Natasha Tamaskar, Vice President, Head of C...
"We are an all-flash array storage provider but our focus has been on VM-aware storage specifically for virtualized applications," stated Dhiraj Sehgal of Tintri in this SYS-CON.tv interview at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Who are you? How do you introduce yourself? Do you use a name, or do you greet a friend by the last four digits of his social security number? Assuming you don’t, why are we content to associate our identity with 10 random digits assigned by our phone company? Identity is an issue that affects everyone, but as individuals we don’t spend a lot of time thinking about it. In his session at @ThingsExpo, Ben Klang, Founder & President of Mojo Lingo, discussed the impact of technology on identity. Sho...
SYS-CON Events announced today that Catchpoint Systems, Inc., a provider of innovative web and infrastructure monitoring solutions, has been named “Silver Sponsor” of SYS-CON's DevOps Summit at 18th Cloud Expo New York, which will take place June 7-9, 2016, at the Javits Center in New York City, NY. Catchpoint is a leading Digital Performance Analytics company that provides unparalleled insight into customer-critical services to help consistently deliver an amazing customer experience. Designed ...
DevOps is being widely accepted (if not fully adopted) as essential in enterprise IT. But as Enterprise DevOps gains maturity, expands scope, and increases velocity, the need for data-driven decisions across teams becomes more acute. DevOps teams in any modern business must wrangle the ‘digital exhaust’ from the delivery toolchain, "pervasive" and "cognitive" computing, APIs and services, mobile devices and applications, the Internet of Things, and now even blockchain. In this power panel at @...
With all the incredible momentum behind the Internet of Things (IoT) industry, it is easy to forget that not a single CEO wakes up and wonders if “my IoT is broken.” What they wonder is if they are making the right decisions to do all they can to increase revenue, decrease costs, and improve customer experience – effectively the same challenges they have always had in growing their business. The exciting thing about the IoT industry is now these decisions can be better, faster, and smarter. Now ...
"Splunk basically takes machine data and we make it usable, valuable and accessible for everyone. The way that plays in DevOps is - we need to make data-driven decisions to delivering applications," explained Andi Mann, Chief Technology Advocate at Splunk and @DevOpsSummit Conference Chair, in this SYS-CON.tv interview at @DevOpsSummit at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
WebRTC is about the data channel as much as about video and audio conferencing. However, basically all commercial WebRTC applications have been built with a focus on audio and video. The handling of “data” has been limited to text chat and file download – all other data sharing seems to end with screensharing. What is holding back a more intensive use of peer-to-peer data? In her session at @ThingsExpo, Dr Silvia Pfeiffer, WebRTC Applications Team Lead at National ICT Australia, looked at differ...
Containers have changed the mind of IT in DevOps. They enable developers to work with dev, test, stage and production environments identically. Containers provide the right abstraction for microservices and many cloud platforms have integrated them into deployment pipelines. DevOps and Containers together help companies to achieve their business goals faster and more effectively. In his session at DevOps Summit, Ruslan Synytsky, CEO and Co-founder of Jelastic, reviewed the current landscape of D...
"We got started as search consultants. On the services side of the business we have help organizations save time and save money when they hit issues that everyone more or less hits when their data grows," noted Otis Gospodnetić, Founder of Sematext, in this SYS-CON.tv interview at @DevOpsSummit, held June 9-11, 2015, at the Javits Center in New York City.
Internet of @ThingsExpo, taking place June 6-8, 2017 at the Javits Center in New York City, New York, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. @ThingsExpo New York Call for Papers is now open.
WebRTC has had a real tough three or four years, and so have those working with it. Only a few short years ago, the development world were excited about WebRTC and proclaiming how awesome it was. You might have played with the technology a couple of years ago, only to find the extra infrastructure requirements were painful to implement and poorly documented. This probably left a bitter taste in your mouth, especially when things went wrong.
Creating replica copies to tolerate a certain number of failures is easy, but very expensive at cloud-scale. Conventional RAID has lower overhead, but it is limited in the number of failures it can tolerate. And the management is like herding cats (overseeing capacity, rebuilds, migrations, and degraded performance). In his general session at 18th Cloud Expo, Scott Cleland, Senior Director of Product Marketing for the HGST Cloud Infrastructure Business Unit, discussed how a new approach is neces...
A critical component of any IoT project is what to do with all the data being generated. This data needs to be captured, processed, structured, and stored in a way to facilitate different kinds of queries. Traditional data warehouse and analytical systems are mature technologies that can be used to handle certain kinds of queries, but they are not always well suited to many problems, particularly when there is a need for real-time insights.