Sunday, September 15, 2013

Windows Storage Spaces R2, The ZFS competition



This post is to describe initial findings and facts about Windows 2012 R2 storage spaces.

I decided to postpone publishing the post till the RTM ed released, and now I can tell that there is almost no change occurred and clear for me so far from the preview release.

Saturday, July 6, 2013

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Hyper-V VM linked Clone - Cloning a vDC - II



Part I described how you can do Linked Cloning in Hyper-V without messing up your Virtual Machines same as VMWare workstation Linked Cloning feature.

In Part II you will be guided through special steps required for virtual Windows Server 2012 Domain Controller linked cloning.

Windows Server 2012 becomes virtualization aware not like previous windows releases, a new VM-Generation-ID unique Identifier is incorporated as an additional attribute of a Domain Controller’s Computer object in AD as well as of VM host which is running Virtual DC instance.


Hyper-V VM linked Clone - Doing it the right way - I

Missing the easy VMWare workstation Linked Cloning feature in Hyper-V client ?
Part I describes how you can do the same, saving huge disk space and the most important without messing up your Virtual Machines.



Part II will guide you through special steps required for virtual Windows Server 2012 Domain Controller cloning since it becomes virtualization aware not like previous windows releases.


Sunday, June 23, 2013

Tricking Windows and create software RAID10 - II

Does it really work..!

In Part 1 I have posted about trick, How you could setup software RAID10 in Windows server 2012 which was not allowed in previous windows releases.

In this post we will discuss What if one of my lovely WD Red disks failed, do this tricky Raid10 setup would be capable to repair my volume and keep my data safe…? Let's find out this...

Tricking Windows and create software Raid10 - I

Before Storage Spaces, RAID10 was not available as a software RAID level in windows, and till now I think it's not officially supported as I didn't find any direct method for doing this, In this post I will guide you through steps and show you the trick of how to setup Raid 10 with 4 HDDs using Windows Server 2012.

Before we can proceed further, if you are new to Windows Storage Spaces and need to know more about it, check quickly below links.

For Windows Server 2012:
Simple How To for Windows 2012:

For Windows 8:
Simple How To for Windows 8:


I am blogging this originally as I wanted to setup the all in one box solution, a server that could run all my VMs and do has the storage appliance that can store all my data and Guest VMs.
At the beginning I was using windows 8 Hyper-V client and NexentaStor CE installed (bare Metal) on another box as my SAN Storage.

The Idea of consolidating my Hypervisor and Storage server in one box would suffice all my Lab needs and will lower my Administration efforts (administering Hyper-V host and NexentaStor as separate different Storage server).
In addition to the ease of administration and the very convenient feature of sever core installation of windows, NIC teaming even if you don't have managed network switch that supports LACP and Hardware compatibility, all previous made windows sever shines into my eyes. First thing came across my mind is to virtualize NexentaStor within Hyper-V and pass-through all physical SATA disks to it, then I can export an iSCSI share to Hyper-V. And since I have already gained decent experience on NexentaStor Administration and how to make it up and running this idea looked acceptable.

NexentaStor has many good features like Hybrid storage devices support, RAM and SSD caching, synchronous writes enhancement, deduplication and data compression, snapshots and many other ZFS powerful features that make it just as professional as NetApp and perform like any powerful hardware RAID controller.

The question now is, do Hyper-V supports NexentaStor as guest OS. ?
aieee (wrong buzzer sound) . No. Solaris is not supported and hence NexentaStor which based on it is not supported too.
I insisted to prove that fact and see it with my own eyes (not always a good habit), may be its not supported but would work in a way that make it enough for a testing environment.
Again, negative results obtained, setup freeze and refused to continue.

Then I decided to give Windows Storage Spaces a hands on review since both Hyper-V and Storage Spaces are a built-in roles in Windows Server, I don't need expensive hardware to support pass-through as NexentaStor Guest won't be implemented in any ways. In my previous NexentaStor setup I ran a RAID10 layout with SSD read caching and I could obtain a very good balance between Data Protection, Throughput and IOPS. Especially when IOPS is an important factor in providing storage for your VMs.
Using the same Disks I used in NexentaStor setup and Hardware described below, I will show you how to setup Raid10 which used to be not supported in previous Windows Releases using your Windows Server 2012.

Hardware used:
4X 1TB WD Red. (Low heat, low noise and good IOPS)
1X 128GB ADATA XPG SX910 2.5" SSD. (used to be caching tier)
1X 500GB WD Blue for sys pool. (500GB is more than enough)
GA-880GM-UD2H. (Cheap but doing good job)
AMD Phenom II X4 955 Black Edition Deneb 3.2GHz. (Simple but not weak)
2X 4GB DDR3 1600MHz Kingston HyperX blu.
Noctua NH-C14 140mm x 2 SSO CPU Cooler. (one of the best Silent Coolers you can get)
HEC 500W 80+ Bronze certified power supply. (Old but Gold)

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