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For the last few years, I’ve been blogging about the Microsoft iSCSI Software Target and its many uses related to Windows Server Failover Clustering, Hyper-V and other server scenarios. Today, Microsoft has made this software publicly available to all users of Windows Server 2008 R2.
The Microsoft iSCSI Software Target has been available for production use as part of Windows Storage Server since early 2007. It has also been available for development and test use by MSDN and TechNet subscribers starting in May 2009. However, until now, there was no way to use the Microsoft iSCSI Software Target in production on a regular server running Windows Server 2008 R2. This new download offers exactly that.
Now available as a public download, the software is essentially the same software that ships with Windows Storage Server 2008 R2. Windows Storage Server 2008 R2 and the public download package will be refreshed (kept in sync) with any software fixes and updates. Those updates are described at http://technet.microsoft.com/en-us/library/gg232597.aspx.
This release was preceded by intense testing by the Microsoft iSCSI Target team, especially in scenarios where the iSCSI Target is used with Hyper-V and with Windows Server Failover Clusters. We do imagine these to be amongst the most commons deployment scenarios.
Testing included running the Microsoft iSCSI Software Target in a two-node Failover Cluster and configuring 92 individual Hyper-V VMs, each running a data intensive application and storing data on a single node of that iSCSI Target cluster. The exciting part of the test was to force an unplanned failure of the iSCSI Target node being used by all the VMs and verify that we had a successful failover to the other node with all 92 VMs continuing to run the application without any interruption.
How to download and install
To download the Microsoft iSCSI Software Target 3.3 for Windows Server 2008 R2, go to http://www.microsoft.com/downloads/en/details.aspx?FamilyID=45105d7f-8c6c-4666-a305-c8189062a0d0 and download a single file called “iSCSITargetDLC.EXE”. (Note: This was just released at 10AM PST on 04/04/2011, so the download might still be replicating to your closest download server. If the link does not work, try again later). This is a self-extracting archive that will show this screen when run:
Select a destination folder and click “Install”. Once it finishes, you will find a few files available to you in that folder:
If you click on the index.htm file on the main folder, you will see the welcome page with a few links to the items included:
To install the iSCSI Target on a computer running Windows Server 2008 R2, simply run the “iscsitarget_public.msi” MSI file from a command line or right-click it on Windows Explorer and choose “Install”.
Frequently Asked Questions (FAQ)
Q: Can I install the Microsoft iSCSI Software Target 3.3 on Windows Server 2008 or Windows Server 2003? A: No. The Microsoft iSCSI Software Target 3.3 can only be installed on Windows Server 2008 R2.
Q: Can I install the Microsoft iSCSI Software Target on Windows Server 2008 R2 with Service Pack 1 (SP1)? A: Yes. In fact, that’s what is recommended.
Q: Can I install the Microsoft iSCSI Software Target on a Core install of Windows Server 2008 R2? A: No. The Microsoft iSCSI Software Target 3.3 is only supported in a Full install.
Q: I don’t have a copy of Windows Server 2008 R2. Where can I get an evaluation copy? A: You download an evaluation version of Windows Server 2008 R2 with Service Pack 1 from http://technet.microsoft.com/en-us/evalcenter/dd459137.aspx
Q: Where is the x86 (32-bit) version of the Microsoft iSCSI Software Target 3.3? A: The Microsoft iSCSI Software Target 3.3, is provided in only in an x64 (64-bit) version, as is Windows Server 2008 R2,
Q: What are these “iSCSITargetClient” MSI files included in the download? A: Those are the optional VSS and VDS providers for the Microsoft iSCSI Software Target 3.3. You should install them in the same computer that runs the iSCSI Initiator if you intend to use VSS or VDS. For details on VSS, see http://blogs.technet.com/b/josebda/archive/2007/10/10/the-basics-of-the-volume-shadow-copy-service-vss.aspx. For details on VDS, see http://blogs.technet.com/b/josebda/archive/2007/10/25/the-basics-of-the-virtual-disk-services-vds.aspx.
Q: Where is the Windows Storage Server 2008 R2 documentation? A: There is some documentation inside the package. Additional documentation is available on the web at http://technet.microsoft.com/en-us/library/gg232606.aspx
Q: Can I use the Microsoft iSCSI Software Target 3.3 as shared storage for a Windows Server Failover Cluster? A: Yes. That is one of its most common uses.
Q: Can I install the Microsoft iSCSI Software Target 3.3 in a Hyper-V virtual machine? A: Yes. We do it all the time.
Q: Can I use the downloaded Microsoft iSCSI Software Target 3.3 in my production environment? A: Yes. Make sure to perform the proper evaluation and testing before deploying any software in a production environment. But you knew that already…
Q: What are the support policies for the Microsoft iSCSI Software Target 3.3 on Windows Server 2008 R2?A: The support policies are listed at http://technet.microsoft.com/en-us/library/gg983493.aspx
I would recommend that you download and read my previous blog posts about the Microsoft iSCSI Software Target. Here are some of the most popular ones.
Please keep in mind that some of these posts mention previous versions of the Microsoft iSCSI Software Target that ran on different Windows Server versions. The overall guidance, however, still applies.
I hope you are as excited as we are about this release. Download it and experiment with it. And don’t forget to post a comment about your experience or send us your feedback.
@Andy - Shortly after the release at around 10AM this morning, the link was not working for a few users, due to replication of the download to different servers. I updated the post to include this information. Please try again later and it should work.
@RaFi - The Microsoft iSCSI Software Target 3.3 does not install on Windows 7. You need to install on Windows Server 2008 R2. Sorry.
@Bob. This post is about the free public download of the Microsoft iSCSI Software Target 3.3 for current users of Windows Server 2008 R2. It is not about a Storage Server upgrade or an evaluation of the Microsoft iSCSI Software Target. I did mention, however, that if you are not a user of Windows Server 2008 R2, you can download an evaluation version of Windows Server 2008 R2.
@David. If you want a standalone Microsoft iSCSI Software Target, you can use local storage.You can use the standalone target to support an Application cluster like a Hyper-V cluster or a SQL Server cluster. If you want to have a fully fault tolerant solution, we suggest that you cluster the Application server and also cluster the Microsoft iSCSI Software Target, which requires shared storage (like a SAS array or an FC array). You can find details about these more complex configurations at blogs.technet.com/.../high-availability-scenarios.aspx - check configuration 7 in that post, which shows a SQL Cluster, connected to an iSCSI Target cluster, connected to some shared storage.
@Rafi - We have nothing to announce at this point about the Single Instance Storage (SIS) component in Windows Storage Server.
Hola Acaba de ponerse de manera gratuita a disposición de todo aquel que lo necesite. Puede descargarse
La costruzione di un’infrastruttura di virtualizzazione richiede necessariamente l’implementazione di
Yes, this is absolutely right. Microsoft just made available Microsoft iSCSI Software Target 3.3 for
Guys, this is unbelievable. I even double checked post date, just to be sure this is not 01 April :)
It's great what we now can use it not only in WSS, but almost everywhere!
Gdy prawie 3 lata temu, na konferencji Heroes Happen Here, chciałem pokazywać dema z klastrowaniem serwerów
Tak z této zprávy mám ohromnou radost… už mnoho let přednáším
Copied from the Virtualization blog One common refrain we hear from you is that you appreciate the fact
This is great news, and a smart decision. Other vendors such as starwind have an edge, since they have HA, block level dedup, load balanced MPIO etc. So this target is no direc competition, making sure the EU & their regulations won't bother MS making this available freely :-)
When you guys made the target available on technet some time ago I already suspected this would happen, and it makes sense: this will push the iSCSI target market as more IT people will be exposed to the technology; its just much more accessable this way. I remember how I had to struggle back in 2008 when installing my first Hyper-V clusters to get a target that supported persistent reservation. I'm glad to see for new enterprising Hyper-V pioneers it's going to be much easier now.